New AstraZeneca report says vaccine was 76% effective in preventing Covid-19 symptoms
3 years, 9 months ago

New AstraZeneca report says vaccine was 76% effective in preventing Covid-19 symptoms

CNN  

CNN — Drug giant AstraZeneca updated its data on how well its coronavirus vaccine works, saying late Wednesday the vaccine showed 76% efficacy against symptomatic coronavirus disease and 100% efficacy against severe or critical disease or the need for hospitalization. On Tuesday, the independent Data and Safety Monitoring Board that reviews data from multiple Covid-19 vaccine candidates expressed concern over AstraZeneca’s announcements on its latest findings, and, unusually, the National Institute of Allergy and Infectious Diseases publicly announced those concerns. “We urge the company to work with the DSMB to review the efficacy data and ensure the most accurate, up-to-date efficacy data be made public as quickly as possible.” On Monday, AstraZeneca said its Covid-19 vaccine showed 79% efficacy against symptomatic disease and 100% efficacy against severe disease and hospitalization. “AstraZeneca will also submit the primary analysis for peer-reviewed publication in the coming weeks.” And as with other coronavirus vaccine trials, the volunteers were not regularly tested for Covid-19, so it’s not known how many may have gotten asymptomatic infections.

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History of this topic

‘Still not over’: WHO cautions of COVID-19 threat ahead of summer holidays after US President Joe Biden tests positive
5 months, 3 weeks ago

‘Still not over’: WHO cautions of COVID-19 threat ahead of summer holidays after US President Joe Biden tests positive

Live Mint  

New Delhi: With US President Joe Biden testing positive for COVID-19 before the Presidential elections, the World Health Organisation has warned the public that Covid is still not over. WHO director-general Tedros Adhanom Ghebreyesus issued a warning, stating that vaccination rates among health professionals and the over-60s—two demographics most at risk of dying from COVID—are alarmingly falling. Globally, 9.8 million …

Covishield Side Effects: Doctors' Group Urges Govt to Review All Covid Vaccines
8 months ago

Covishield Side Effects: Doctors' Group Urges Govt to Review All Covid Vaccines

News 18  

In the wake of pharmaceutical giant AstraZeneca admitting in a UK court that its Covid vaccine can cause blood clots in rare cases, a group of doctors on Thursday expressed deep concern over the safety of the Covishield vaccine manufactured by the Serum Institute of India. At a press conference, the doctors, under the banner of the Awaken India Movement, …

AstraZeneca withdraws Covishield pointing to low demand, but did rare side effects also play a role?
8 months ago

AstraZeneca withdraws Covishield pointing to low demand, but did rare side effects also play a role?

The Hindu  

Published : May 09, 2024 13:21 IST - 3 MINS READ The pharmaceutical giant AstraZeneca has reportedly withdrawn its COVID-19 vaccine Vaxzevria, also known as Covishield, worldwide, citing commercial reasons for the decision. Vaxzevria saved millions of lives AstraZeneca, who developed the vaccine with Oxford University, said it was “incredibly proud of the role Vaxzevria played in ending the global …

AstraZeneca reaffirms Covid vaccine safety amid rare side effect concerns
8 months, 1 week ago

AstraZeneca reaffirms Covid vaccine safety amid rare side effect concerns

India TV News  

In response to recent concerns regarding potential rare side effects associated with the AstraZeneca-Oxford COVID-19 vaccine, the pharmaceutical company has underscored its unwavering commitment to patient safety while affirming the vaccine's overall safety profile. This comes in the wake of a recent admission by AstraZeneca, the pharmaceutical company, that its Covid vaccine Covishield and Vaxzevria "can, in very rare cases, …

Newest COVID shots are 54% effective in preventing symptoms, CDC finds
11 months, 1 week ago

Newest COVID shots are 54% effective in preventing symptoms, CDC finds

Associated Press  

NEW YORK — The latest versions of COVID-19 vaccines were 54% effective at preventing symptomatic infection in adults, according to the first U.S. study to assess how well the shots work. The 54% finding is similar to what’s been reported in other countries, and it’s also about what was reported for an earlier vaccine version, said the Ruth Link-Gelles of …

Covid-19 vaccination rate is ‘lower than we’d like to see,’ CDC says
1 year, 1 month ago

Covid-19 vaccination rate is ‘lower than we’d like to see,’ CDC says

CNN  

CNN — Respiratory virus season is ramping up across the United States, and the US Centers for Disease Control and Prevention is warning that low vaccination rates are leaving many at risk. There are a number of reasons why it’s important for people to get the latest Covid-19 vaccine, CDC Director Dr. Mandy Cohen told CNN. “COVID-19 vaccines don’t prevent …

Fact-check on vaccine-related misinformation
2 years ago

Fact-check on vaccine-related misinformation

China Daily  

Vaccine is a powerful weapon in the fight against COVID-19. As the second COVID booster becomes available for eligible people and the health authorities work to boost senior vaccination rates, misinformation about COVID-19 vaccines is also rising. The COVID-19 vaccines work by imitating an infection and can cause mild side effects, such as a fever or pain at the injection …

Fact-check on vaccine-related misinformation
2 years ago

Fact-check on vaccine-related misinformation

China Daily  

Vaccine is a powerful weapon in the fight against COVID-19. As the second COVID booster becomes available for eligible people and the health authorities work to boost senior vaccination rates, misinformation about COVID-19 vaccines is also rising. The COVID-19 vaccines work by imitating an infection and can cause mild side effects, such as a fever or pain at the injection …

As COVID-19 spikes in California, booster shots could make all the difference
2 years, 1 month ago

As COVID-19 spikes in California, booster shots could make all the difference

LA Times  

With coronavirus cases and hospitalizations rising in Los Angeles County, officials are voicing new confidence in the effectiveness of the updated COVID-19 booster shot. New data has found that the updated COVID-19 vaccines offer “significant additional protection” against symptomatic infection in people who were previously vaccinated or boosted with the older formula. “We have seen very low uptake of the …

FDA advisors back Moderna’s COVID-19 vaccine for older kids
2 years, 6 months ago

FDA advisors back Moderna’s COVID-19 vaccine for older kids

LA Times  

A vial of the Moderna COVID-19 vaccine on a counter at a pharmacy in Portland, Ore. A government advisory panel has endorsed the company’s vaccine for school-age children and teens. Moderna’s COVID-19 vaccine has long been available for adults in the U.S. and elsewhere and more than three dozen countries offer it to children, too. If the FDA authorizes Moderna’s …

Advisers to the FDA back Novavax COVID vaccine
2 years, 7 months ago

Advisers to the FDA back Novavax COVID vaccine

NPR  

Advisers to the FDA back Novavax COVID vaccine Enlarge this image toggle caption Karen Ducey/Getty Images Karen Ducey/Getty Images In a 21-0 vote with one abstention, advisers to the Food and Drug Administration recommended that the agency authorize Novavax's two-dose vaccine against COVID-19. In comments to the committee before its vote, Dr. Peter Marks, the FDA's top vaccine official said, …

Q&A: Novavax hopes its COVID shot wins over FDA, vaccine holdouts
2 years, 7 months ago

Q&A: Novavax hopes its COVID shot wins over FDA, vaccine holdouts

LA Times  

Americans may soon get a new COVID-19 vaccine option — shots made with a more tried-and-true technology than today’s versions. “What I’ve seen of the Novavax data so far is it’s a really impressive protein vaccine,” said University of Pennsylvania immunologist E. John Wherry. Novavax, a small biotech company, created the vaccine in its research lab, but the Serum Institute …

New plant-based Covid vaccine 70% effective against variants: Study
2 years, 8 months ago

New plant-based Covid vaccine 70% effective against variants: Study

India Today  

A new plant-based Covid-19 vaccine is nearly 70 per cent effective against symptomatic disease caused by five variants of the coronavirus, according to results of the human clinical trial of the preventive. The study, published on Thursday in the New England Journal of Medicine, shows that the vaccine efficacy was 69.5 per cent against any symptomatic Covid-19 caused by five …

'New plant-based COVID-19 vaccine 70% effective against variants'
2 years, 8 months ago

'New plant-based COVID-19 vaccine 70% effective against variants'

Firstpost  

The vaccine developed by researchers at Canadian biotechnology company Medicago contains coronavirus-like particles produced in plants which are combined with an adjuvant that helps vaccines work better Toronto: A new plant-based COVID-19 vaccine is nearly 70 per cent effective against symptomatic disease caused by five variants of the coronavirus, according to results of the human clinical trial of the preventive. …

AstraZeneca Covid Booster Shot Effective Against Severe Disease, UK Study Finds
2 years, 8 months ago

AstraZeneca Covid Booster Shot Effective Against Severe Disease, UK Study Finds

News 18  

London: The third dose of AstraZeneca COVID-19 vaccine is effective against symptomatic disease and hospitalisation, offering protection comparable to a booster shot of the Pfizer preventive, according to a study conducted in the UK. The results show that after 25 or more weeks since primary vaccination with AstraZeneca, vaccine effectiveness against symptomatic disease post Omicron infection was 8.0 per cent …

In First Quantitative Sero-survey in Mumbai, 99.93% Participants Found with Covid-19 Antibodies
2 years, 8 months ago

In First Quantitative Sero-survey in Mumbai, 99.93% Participants Found with Covid-19 Antibodies

News 18  

In the first quantitative sero-survey conducted in March this year, COVID-19 antibodies were found in 3,097 out of the 3,099 health and frontline workers, who were examined, the Brihanmumbai Municipal Corporation said. Comparatively, more antibodies were found in the blood samples of the employees, who have taken the preventive or booster doses of COVID-19 vaccines as compared to the fully …

New COVID-19 data shows unvaccinated have 'triple' the risk of death compared with fully jabbed
2 years, 8 months ago

New COVID-19 data shows unvaccinated have 'triple' the risk of death compared with fully jabbed

ABC  

South Australian health authorities have released COVID vaccination statistics showing people who are unvaccinated are more than three times as likely to die from the virus than those who've had three doses. Key points: Unvaccinated people have "triple the chance of dying" of those with three or more jabs, SA's health chief said Nicola Spurrier issued the warning ahead of …

AstraZeneca set to abandon push for US vaccine approval
2 years, 9 months ago

AstraZeneca set to abandon push for US vaccine approval

The Telegraph  

AstraZeneca is braced to abandon efforts to get its Covid vaccine approved in the US if it is simply "banging its head against a brick wall indefinitely" with regulators. Speaking to the Financial Times, he said: “If we don’t end up submitting it for a BLA, I don’t think it will have an impact around the world.” The company has …

How effective are COVID-19 vaccines for children 5-11? New data offer some answers
2 years, 10 months ago

How effective are COVID-19 vaccines for children 5-11? New data offer some answers

LA Times  

Dr. Susan Wu, right, chats with Kimberli Samuel and her 7-year-old daughter, Amelle Samuel, who got her first dose of Pfizer-BioNtech COVID-19 vaccine at Children’s Hospital Arcadia Specialty Care Center in Arcadia in January. Promising new data The good news is that recent data — a study from the New York State Department of Health that hasn’t been peer reviewed, …

Pfizer Covid-19 vaccine effectiveness fell quickly for kids during Omicron surge but still offered some protection against severe diseae
2 years, 10 months ago

Pfizer Covid-19 vaccine effectiveness fell quickly for kids during Omicron surge but still offered some protection against severe diseae

CNN  

CNN — The effectiveness of the Pfizer/BioNTech Covid-19 vaccines for children waned quickly during the Omicron surge, especially among children ages 5 to 11, but was still protective against severe disease, according to new data from the New York State Department of Health. “The data are not surprising as the vaccine was developed in response to an earlier COVID-19 variant …

COVID-19 pandemic: Novavax says protein vaccine works for kids as young as 12
2 years, 11 months ago

COVID-19 pandemic: Novavax says protein vaccine works for kids as young as 12

India TV News  

Highlights On Feb 10, Novavax announced that its COVID vaccine proved safe, effective in study of 12-17 yr olds Novavax makes a protein-based vaccine- a different type than the most widely used shots Novavax plans to soon seek expanded use of its shots down to age 12 Novavax announced on Thursday that its COVID-19 vaccine proved safe and effective in …

COVID19 vaccines offer lasting protection, claims study
2 years, 11 months ago

COVID19 vaccines offer lasting protection, claims study

India TV News  

New research has found that COVID vaccination offers long-lasting protection from the worst outcomes of infection. The study found that the effectiveness of the Pfizer and Moderna mRNA vaccines in reducing the risk of COVID-19 reached a peak of about 95 per cent two months after the first dose and then gradually declined. At seven months, the Pfizer vaccine dropped …

Prior infection, vaccines provide best protection from COVID
2 years, 11 months ago

Prior infection, vaccines provide best protection from COVID

Associated Press  

NEW YORK — A new study in two states that compares coronavirus protection from prior infection and vaccination concludes getting the shots is still the safest way to prevent COVID-19. The study examined infections in New York and California last summer and fall and found people who were both vaccinated and had survived a prior bout of COVID-19 had the …

COVID-19 vaccines offer lasting protection, claims study
2 years, 11 months ago

COVID-19 vaccines offer lasting protection, claims study

India TV News  

A new research has found that COVID-19 vaccination offers long-lasting protection from the worst outcomes of COVID-19. "This is an excellent example of the wonderful research partnership between the Gillings School and NCDHHS, who are working together to generate the evidence base needed to keep our communities safe," said Penny Gordon-Larsen, PhD, Carla Smith Chamblee Distinguished Professor of Global Nutrition …

Prior infection, vaccines provide best protection from COVID
2 years, 11 months ago

Prior infection, vaccines provide best protection from COVID

LA Times  

A nursing home resident receives a COVID-19 booster shot. A new study that compares prior infection and vaccination concludes getting the shots is still the safest way to prevent COVID-19. A new study that compares prior infection and vaccination among people in California and New York concludes that getting the shots is still the safest way to prevent COVID-19. The …

As COVID's Omicron variant surges, do over 60s who got the AstraZeneca vaccine need a booster sooner?
3 years ago

As COVID's Omicron variant surges, do over 60s who got the AstraZeneca vaccine need a booster sooner?

ABC  

Linda Fisher and her husband Ken are members of Generation AZ: the group of those aged 60+ who lined up for an AstraZeneca vaccine, the only one available to their age group for some time. "If Omicron didn't exist you would probably feel pretty relaxed around Christmas this year," he says. "Most people have a certain degree of immunity which …

COVID: Study suggests AstraZeneca booster works against Omicron
3 years ago

COVID: Study suggests AstraZeneca booster works against Omicron

Al Jazeera  

Findings from the study, which has yet to be peer reviewed, match those from Pfizer-BioNTech and Moderna. AstraZeneca has said that a third dose of its COVID-19 vaccine “significantly” lifted antibody levels against the Omicron coronavirus variant, citing data from a new laboratory study. Boosters ‘limit Omicron spread’ Oxford’s researchers analysed blood samples taken from individuals infected with COVID-19; those …

Research shows huge benefit of COVID-19 booster shots
3 years, 1 month ago

Research shows huge benefit of COVID-19 booster shots

LA Times  

In research likely to galvanize U.S. support for booster shots, scientists found that Israel’s aggressive campaign to shore up waning coronavirus immunity with a third dose of COVID-19 vaccine has saved lives and reduced new infections across the age spectrum. Coincidentally, the new research comes on a day when Pfizer and BioNTech acknowledged that two doses of its vaccine “may …

Booster dose of six Covid vaccines safe, increases immunity: Lancet study
3 years, 1 month ago

Booster dose of six Covid vaccines safe, increases immunity: Lancet study

Deccan Chronicle  

New Delhi: Six different COVID-19 boosters are safe and elicit strong immune response in people who have previously received a two-dose course of AstraZeneca or Pfizer vaccines, according to a study published in The Lancet journal. Two doses of AstraZeneca and Pfizer vaccines have shown 79 per cent and 90 per cent protection, respectively, against hospitalisation and death after six …

Covishield: Oxford-Astrazeneca vaccine remained effective even during India’s brutal second wave
3 years, 1 month ago

Covishield: Oxford-Astrazeneca vaccine remained effective even during India’s brutal second wave

The Independent  

For free real time breaking news alerts sent straight to your inbox sign up to our breaking news emails Sign up to our free breaking news emails Sign up to our free breaking news emails SIGN UP I would like to be emailed about offers, events and updates from The Independent. Read our privacy policy The Covishield vaccine was effective …

Covaxin shows 50% effectiveness against symptomatic Covid-19, says Lancet study
3 years, 1 month ago

Covaxin shows 50% effectiveness against symptomatic Covid-19, says Lancet study

India Today  

Two doses of Covaxin are 50 per cent effective against the symptomatic disease, according to the first real-world assessment of India's indigenous Covid-19 vaccine published in The Lancet Infectious Diseases journal. Results of an interim study recently published in The Lancet showed that two doses of Covaxin, also known as BBV152, had 77.8 per cent efficacy against symptomatic disease and …

Covid booster vaccine halves risk of catching virus
3 years, 1 month ago

Covid booster vaccine halves risk of catching virus

The Telegraph  

People who have had a booster jab are half as likely to test positive for Covid than those who had their second dose six months ago, new figures from the Office for National Statistics show. The latest data also revealed that unvaccinated people are five times more likely to be infected than those who have had their top-up jab. In …

AstraZeneca age group has fewer antibodies against corona, blood bank finds
3 years, 2 months ago

AstraZeneca age group has fewer antibodies against corona, blood bank finds

Dutch News  

People in their early sixties, the age group that was given the AstraZeneca vaccine, have fewer antibodies against coronavirus than other vaccinated groups, according to national blood bank Sanquin. A study of around 1,400 samples from blood donors found that people in the 18 to 25 age group had on average eight times as many antibodies as people aged 61 …

AstraZeneca seems to be losing efficacy fastest: blood bank
3 years, 2 months ago

AstraZeneca seems to be losing efficacy fastest: blood bank

NL Times  

Vaccinated people between the ages of 61 and 65 have a lot fewer antibodies against the coronavirus than vaccinated people in other age groups. According to Zaaijer, the very youngest donors, aged 18 to 25, have on average almost eight times more antibodies in their blood than people in the group aged 61 to 65. An older age group, aged …

Study shows dramatic decline in effectiveness of all three COVID-19 vaccines over time
3 years, 2 months ago

Study shows dramatic decline in effectiveness of all three COVID-19 vaccines over time

LA Times  

A study of 780,000 veterans shows a dramatic decline in effectiveness for all three COVID-19 vaccines in use in the U.S. As the Delta variant became the dominant strain of the coronavirus across the United States, all three COVID-19 vaccines available to Americans lost some of their protective power, with vaccine efficacy among a large group of veterans dropping between …

Effectiveness of Covid vaccines declining somewhat
3 years, 2 months ago

Effectiveness of Covid vaccines declining somewhat

NL Times  

The effectiveness of the Covid-19 vaccines in protecting vaccinated people against severe illness and transmission is declining somewhat, RIVM director Jaap van Dissel said to parliament on Wednesday, NOS reports. The vaccines' effectiveness in protecting against transmission dropped from 75 percent in June to 50 percent now, Van Dissel said. More people are being hospitalized in the big cities, Van …

5 New Things We Learned About COVID In October 2021
3 years, 2 months ago

5 New Things We Learned About COVID In October 2021

Huff Post  

It’s understandable, given the massive scale of the pandemic. It’s OK to mix and match booster doses In September, federal health regulators approved booster doses of Moderna and Johnson & Johnson vaccines for certain Americans, greatly expanding who is eligible for another shot. People who are 65-plus, as well as adults 18 and up who live in a long-term care …

COVID-19 vaccines more protective than past infection, study shows
3 years, 2 months ago

COVID-19 vaccines more protective than past infection, study shows

LA Times  

A nursing student draws a COVID-19 vaccine into a syringe. A new study shows that vaccinations can offer better protection against COVID-19 than natural immunity from a prior infection. Unvaccinated people who had been infected months earlier were 5 times more likely to get COVID-19 than fully vaccinated people who didn’t have a prior infection, researchers concluded in a new …

Pfizer's COVID-19 booster shot is safe, 95.6 percent effective against virus in patients 16 years and older
3 years, 2 months ago

Pfizer's COVID-19 booster shot is safe, 95.6 percent effective against virus in patients 16 years and older

Firstpost  

Several countries have already approved Covid-19 booster shots to increase immunity in people who have already been vaccinated, but whose protection may have dipped after several months, per some studies. A booster shot of the anti-Covid-19 vaccine developed by Pfizer/BioNTech is 95.6 percent effective against symptomatic infection, according to trial data published by the makers on Thursday. The clinical phase …

People who got Covid-19 vaccines were less likely to die from any cause compared to unvaccinated people, study finds
3 years, 2 months ago

People who got Covid-19 vaccines were less likely to die from any cause compared to unvaccinated people, study finds

CNN  

CNN — People who got Covid-19 vaccines were not only less likely to die from the virus, but they were less likely to die from any cause over the following months, researchers reported Friday. That’s in addition to the mounting evidence from other studies showing that the COVID-19 vaccines are effective against COVID-19 infection, serious illness, and death.” The team …

Mix-and-match vaccines highly effective against COVID-19: Lancet study
3 years, 2 months ago

Mix-and-match vaccines highly effective against COVID-19: Lancet study

Deccan Chronicle  

London: People who received a first dose of the Oxford-AstraZeneca COVID-19 vaccine followed by an mRNA vaccine shot had a lower risk of infection compared to those immunised with both doses of the AstraZeneca preventive, according to a nationwide study in Sweden. "However, our study shows a greater risk reduction for people who received an mRNA vaccine after having received …

New CDC data shows the risk of dying from Covid-19 is 11 times higher for unvaccinated adults than for fully vaccinated adults
3 years, 2 months ago

New CDC data shows the risk of dying from Covid-19 is 11 times higher for unvaccinated adults than for fully vaccinated adults

CNN  

CNN — Throughout August, the risk of dying from Covid-19 was 11 times higher for unvaccinated adults than for fully vaccinated adults in the United States, according to new data published by the US Centers for Disease Control and Prevention. The CDC data shows that the risk of death from Covid-19 for unvaccinated adults has dipped in recent weeks as …

Vaccines may have led to over a quarter-million Covid-19 fewer cases and 39,000 deaths among seniors
3 years, 3 months ago

Vaccines may have led to over a quarter-million Covid-19 fewer cases and 39,000 deaths among seniors

CNN  

CNN — Before vaccines, the San Francisco Department of Public Health needed three whiteboards to capture all the names of senior facilities that had Covid-19 outbreaks. “The fact that you were able to stop that many deaths and that many cases and hospitalizations even that early on, just a few months into when people could get vaccinated, that really goes …

AstraZeneca Covid-19 vaccine shows 74% efficacy in large US trial
3 years, 3 months ago

AstraZeneca Covid-19 vaccine shows 74% efficacy in large US trial

India Today  

AstraZeneca Plc's Covid-19 vaccine demonstrated 74% efficacy at preventing symptomatic disease, a figure that increased to 83.5% in people aged 65 and older, according to long-awaited results of the company's US clinical trial published on Wednesday. Overall efficacy of 74% was lower than the interim 79% figure reported by the British drugmaker in March, a result AstraZeneca revised days later …

How effective are the Pfizer, Moderna and AstraZeneca COVID-19 vaccines?
3 years, 3 months ago

How effective are the Pfizer, Moderna and AstraZeneca COVID-19 vaccines?

ABC  

When COVID-19 vaccines were being developed, manufacturers had to hit an efficacy rate of 50 per cent before their jabs could get approval. Australian National Centre for Immunisation Research and Surveillance director Kristine Macartney said it was important that people do not just look at one study or compare one study with another because, often, "the studies are done in …

Concerns about Delta transmission, overburdened hospitals and Covid-19 deaths drove recent rise in vaccinations, poll says
3 years, 3 months ago

Concerns about Delta transmission, overburdened hospitals and Covid-19 deaths drove recent rise in vaccinations, poll says

CNN  

CNN — A new Kaiser Family Foundation poll found that the highly transmissible Delta variant, overburdened hospitals and knowing someone who has died or become seriously ill from Covid-19 drove recent increases in vaccination. The report said those living in areas with high numbers of Covid-19 cases and deaths were more likely to say they had been vaccinated since June …

New Study Finds A Huge Perk Of Getting Vaccinated After Having COVID
3 years, 3 months ago

New Study Finds A Huge Perk Of Getting Vaccinated After Having COVID

Huff Post  

VioletaStoimenova via Getty Images A new study shows people in high-transmission settings have high levels of protection if they've been vaccinated and had COVID-19. And by far the lowest attack rate was among fully vaccinated people who’d also been previously infected with COVID-19 — “highlighting the importance of vaccination, even among persons with previous infection,” argued the authors of the …

Vaccine protection against Covid-19 wanes over time, especially for older people, CDC says
3 years, 3 months ago

Vaccine protection against Covid-19 wanes over time, especially for older people, CDC says

CNN  

CNN — The protection provided by Covid-19 vaccines appears to wane over time, especially for people 65 and older, a US Centers for Disease Control and Prevention expert said Wednesday. The conversation for now is focused on a third dose – a booster – of the company’s two-dose Covid-19 vaccine, and experience with past vaccines suggests a third dose may …

Two dose version of Johnson & Johnson shot 94% effective against Covid-19, study finds
3 years, 3 months ago

Two dose version of Johnson & Johnson shot 94% effective against Covid-19, study finds

CNN  

CNN — A two-dose version of Johnson & Johnson’s coronavirus vaccine provides 94% protection against symptomatic infection, the company said Tuesday – making a two-dose regimen of J&J’s Janssen vaccine comparable to a two-dose regimen of Moderna’s or Pfizer’s. “Our large real-world-evidence and Phase 3 studies confirm that the single-shot Johnson & Johnson vaccine provides strong and long-lasting protection against …

Covid-19 booster shots not appropriate amid high vaccine efficacy: Study
3 years, 3 months ago

Covid-19 booster shots not appropriate amid high vaccine efficacy: Study

India Today  

Vaccine efficacy against severe Covid-19, even for the delta variant, is so high that booster doses for the general population are not appropriate at this stage in the pandemic, according to a review by an international group of scientists published in The Lancet on Monday. Although vaccines are less effective against asymptomatic disease or against transmission than against severe disease, …

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