Some vaccines last a lifetime. Here’s why covid-19 shots don’t
3 years, 3 months ago

Some vaccines last a lifetime. Here’s why covid-19 shots don’t

Live Mint  

Why don’t Covid-19 vaccinations last longer? “A really good vaccine makes it so someone does not get infected even if they are exposed to the virus,” said Rustom Antia, a biology professor at Emory University who studies immune responses. “Basically, it’s levels of antibodies or neutralizing antibodies per milliliter of blood,” said Mark Slifka, a professor at Oregon Health & Science University. With flu, we’ve adjusted by making a new flu vaccine each year that as closely as possible matches the new strain of flu.” Flu vaccines can offer protection for at least six months. “Vaccines are very unlikely to lead to long-lasting herd immunity for many respiratory infections,” Dr. Antia said.

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History of this topic

Does frequently updating COVID-19 vaccines have any benefits? | Explained
10 months, 3 weeks ago

Does frequently updating COVID-19 vaccines have any benefits? | Explained

The Hindu  

Researchers update the composition of influenza vaccines every six months to match the strains of the virus that are circulating in the wild, so that the shots may provide protective immunity against the flu. The VE of COVID-19 vaccines varies according to the disease’s progression as well as the circulating strains. Thus, researchers worldwide rushed to revise COVID-19 vaccines that …

Scientists inch closer to Covid vaccine that provides lifelong protection
1 year, 8 months ago

Scientists inch closer to Covid vaccine that provides lifelong protection

The Independent  

Sign up for our free Health Check email to receive exclusive analysis on the week in health Get our free Health Check email Get our free Health Check email SIGN UP I would like to be emailed about offers, events and updates from The Independent. Read our privacy policy Scientists have shown that a new Covid vaccine provides more durable …

COVID-19 vaccines offer significant protection against reinfection: Study
2 years, 1 month ago

COVID-19 vaccines offer significant protection against reinfection: Study

India TV News  

COVID-19 vaccine: A recent study revealed that people earlier infected with the SARS-CoV-2 virus still benefit from vaccination against COVID-19, gaining 60% to 94% protection against reinfection. “In our study, we find a significant vaccine effectiveness against SARS-CoV-2 reinfection, and this shows the importance of vaccination also for those who might be protected by natural immunity," said Katrine Finderup Nielsen …

Long COVID affects more older adults; shots don’t prevent it
2 years, 7 months ago

Long COVID affects more older adults; shots don’t prevent it

Associated Press  

New U.S. research on long COVID-19 provides fresh evidence that it can happen even after breakthrough infections in vaccinated people, and that older adults face higher risks for the long-term effects. A separate report from the Centers for Disease Control and Prevention found that up to a year after an initial coronavirus infection, 1 in 4 adults aged 65 and …

How has the COVID-19 pandemic changed after two years?
2 years, 10 months ago

How has the COVID-19 pandemic changed after two years?

Associated Press  

How has the COVID-19 pandemic changed after two years? Safe, effective vaccines have been developed and there’s better understanding of how to treat people sickened by the virus. Among the options are antivirals, such as the drug remdesivir, or newer pills from Pfizer and Merck; anti-inflammatory drugs including steroids; and depending on what variant is circulating, lab-made antibodies to attack …

Vaccine protection better maintained against severe COVID-19: Lancet study
2 years, 11 months ago

Vaccine protection better maintained against severe COVID-19: Lancet study

Firstpost  

The results showed that protection against infection of any severity waned progressively following the peak which occurred a month after the second dose London: The vaccine-induced protection against SARS-CoV-2 infection wanes within a few months, but protection against severe COVID-19 appears to be better maintained, according to a study published in The Lancet journal. “The bad news is that the …

Vaccine protection better maintained against severe Covid-19: Lancet study
2 years, 11 months ago

Vaccine protection better maintained against severe Covid-19: Lancet study

India Today  

The vaccine-induced protection against SARS-CoV-2 infection wanes within a few months, but protection against severe COVID-19 appears to be better maintained, according to a study published in The Lancet journal. "The bad news is that the protection against infection seems to be diminished by seven months after the second dose of vaccine," said Peter Nordstrom, a professor at Umea University …

Vaccine protection better maintained against severe COVID-19: Lancet study
2 years, 11 months ago

Vaccine protection better maintained against severe COVID-19: Lancet study

Deccan Chronicle  

London: The vaccine-induced protection against SARS-CoV-2 infection wanes within a few months, but protection against severe COVID-19 appears to be better maintained, according to a study published in The Lancet journal. "The bad news is that the protection against infection seems to be diminished by seven months after the second dose of vaccine," said Peter Nordstrom, a professor at Umea …

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 …

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 …

Booster longevity: Data reveals how long a third shot protects
2 years, 11 months ago

Booster longevity: Data reveals how long a third shot protects

NPR  

Booster longevity: Data reveals how long a third shot protects Enlarge this image toggle caption Dimas Ardian/Bloomberg via Getty Images Dimas Ardian/Bloomberg via Getty Images We've known for about a month now that a third shot of the vaccine is critical for protecting against infection with the omicron variant — and for keeping people out of the hospital. Protection against …

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 …

Explained: Why T cell vaccines could be the key to long-term immunity from COVID-19
2 years, 11 months ago

Explained: Why T cell vaccines could be the key to long-term immunity from COVID-19

Firstpost  

Many of the doses designed to date – including Moderna’s, Pfizer’s and AstraZeneca’s – have focused just on the spike protein of the coronavirus. The main types are B cells, which make antibodies, and T cells, which either support B cell antibody production or act as killer cells to destroy the virus. This knowledge suggests that, against COVID, a good …

COVID-19: Protein-based vaccines give hope
3 years ago

COVID-19: Protein-based vaccines give hope

The Hindu  

Many people who refuse to get vaccinated against COVID-19 say they don't trust the technology behind mRNA vaccines, such as in BioNTech-Pfizer and Moderna shots. Protein-based vaccines appear to offer a good level of protection against COVID-19 and produce fewer side effects than those existing and approved mRNA and vector-based vaccines. Urgently needed for global vaccine campaign Experts say protein-based …

Mix and matching some COVID vaccines gives high immunity: Study
3 years, 1 month ago

Mix and matching some COVID vaccines gives high immunity: Study

Al Jazeera  

Oxford University study finds mixing a first dose of the Pfizer or Astrazeneca vaccine with a second Moderna shot yields higher antibodies. “I think the data from this study will be especially interesting and valuable to low- and middle-income countries where they’re still rolling out the first two doses of vaccines,” Snape said. “We’re showing … you don’t have to …

Covid vaccine that creates T-cells ‘gives better immune response than current jabs’
3 years, 1 month ago

Covid vaccine that creates T-cells ‘gives better immune response than current jabs’

The Telegraph  

A new vaccine designed to specifically create T-cells against Covid produces a better immune response than the alternatives already in use, according to trial data. "The induction of SARS-CoV-2 T-cell immunity is a central goal for vaccine development and of particular importance for patients with congenital or acquired B-cell deficiencies," the researchers wrote in a paper published in Nature. T-cell …

Covid: Do vaccines wear off and why do we need booster jabs?
3 years, 1 month ago

Covid: Do vaccines wear off and why do we need booster jabs?

The Independent  

Sign up to our free Living Well email for advice on living a happier, healthier and longer life Live your life healthier and happier with our free weekly Living Well newsletter Live your life healthier and happier with our free weekly Living Well newsletter SIGN UP I would like to be emailed about offers, events and updates from The Independent. …

A new protein-based COVID-19 vaccine made in US doesn't need cold storage, shows study
3 years, 2 months ago

A new protein-based COVID-19 vaccine made in US doesn't need cold storage, shows study

Firstpost  

The new vaccine candidate elicited strong immune responses against SARS-CoV-2, the virus that causes COVID-19, and its variants in mice Boston: Scientists have developed a new protein-based vaccine candidate for COVID-19 that they say is much easier to produce and does not need refrigeration. They said the new vaccine design, described in the PNAS journal, could help fill global vaccination …

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 …

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 …

Pfizer vaccine highly effective against Covid hospitalisations for six months: Study
3 years, 3 months ago

Pfizer vaccine highly effective against Covid hospitalisations for six months: Study

Deccan Chronicle  

Washington: Two doses of the Pfizer COVID-19 vaccine are 90 per cent effective against hospitalisation from the disease for all variants, including Delta, for at least six months, according to a study published in The Lancet journal on Tuesday. The researchers found that over the study period, effectiveness of the vaccine against all SARS-COV-2 infections declined, falling from 88 per …

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 …

How long does immunity against COVID-19 last after vaccination?
3 years, 3 months ago

How long does immunity against COVID-19 last after vaccination?

The Hindu  

How long does immunity against COVID-19 last after vaccination? Though breakthrough infections – people testing positive for COVID-19 even after vaccination – have been reported in Karnataka, Dr. Mudassir Azeez Khan, Head of Community Medicine at Mysore Medical College and Research Institute, in a presentation at a recent meeting of the newly constituted Mysuru District Technical Experts Committee on COVID-19, …

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, …

Can COVID infection give more immunity than vaccines? Maybe, but that doesn't mean you should try to catch it
3 years, 4 months ago

Can COVID infection give more immunity than vaccines? Maybe, but that doesn't mean you should try to catch it

Firstpost  

A common reason to remain unvaccinated is the misconception that waiting for natural immunity by choosing infection over-vaccination is an option. The low rate of COVID-related hospitalisations among vaccinated participants would probably be strikingly lower than among non-vaccinated people without prior infection, but this group was not included in the analyses. Several studies show a substantial boost in both antibody …

80 per cent COVID-19 immunity lost in 6 months in some after Pfizer shot: US study
3 years, 4 months ago

80 per cent COVID-19 immunity lost in 6 months in some after Pfizer shot: US study

Deccan Chronicle  

Washington: COVID-19 antibodies produced by the Pfizer vaccine decreased more than 80 per cent in senior nursing home residents and their caregivers six months after receiving their second dose, a US study has found. The research led by Case Western Reserve University and Brown University in the US studied blood samples of 120 nursing home residents and 92 health care …

Effectiveness of the Covid vaccines against hospitalizations has waned over time, CDC says
3 years, 4 months ago

Effectiveness of the Covid vaccines against hospitalizations has waned over time, CDC says

Daily Mail  

COVID-19 vaccines have lost some of their effectiveness in preventing hospitalizations, data from the U.S. Centers for Disease Control and Prevention shows. Vaccine effectiveness in preventing hospitalizations has fallen as low as 75 percent, from a high of 95 percent that was first touted when the shots first became available in late 2020. Data from the CDC finds that the …

Immunity To COVID-19 Could Last Longer Than You'd Think
3 years, 4 months ago

Immunity To COVID-19 Could Last Longer Than You'd Think

NPR  

Immunity To COVID-19 Could Last Longer Than You'd Think Enlarge this image Malaka Gharib/ NPR Malaka Gharib/ NPR All around the world, there seem to be signs that immunity to SARS-CoV-2, the coronavirus that causes the disease COVID-19, doesn't last very long after you're vaccinated. "If you were vaccinated six months ago, your immune system has been training for six …

COVID-19 vaccines don’t destroy T cells or weaken immune system
3 years, 4 months ago

COVID-19 vaccines don’t destroy T cells or weaken immune system

Associated Press  

CLAIM: A study from the Francis Crick Institute in London found that Pfizer’s COVID-19 vaccine destroys a type of white blood cell called the T cell and weakens the immune system. The articles claim that the study shows the Pfizer COVID-19 vaccine “destroys T cells” and “weakens the immune system.” But that’s not at all what the research shows, according …

Johnson & Johnson files application to test its COVID vaccine on adolescents; all you need to know
3 years, 4 months ago

Johnson & Johnson files application to test its COVID vaccine on adolescents; all you need to know

Firstpost  

The US-based pharmaceutical company noted that it is committed to facilitating global equitable access to its COVID-19 vaccine and recognise the unmet needs of children Johnson & Johnson Friday said it has submitted an application to the Indian drug regulator to conduct a study of its COVID-19 vaccine in adolescents aged 12-17 years. The US-based pharmaceutical company noted that it …

Why are COVID-19 booster shots needed anyway?
3 years, 4 months ago

Why are COVID-19 booster shots needed anyway?

LA Times  

Syringes loaded with Pfizer-BioNTech vaccine are ready to be used at an open COVID-19 vaccination site on the Jackson State University campus in Jackson, Miss. Mounting evidence in support of that suspicion prompted the Biden administration’s endorsement of booster shots Wednesday as a way to shore up Americans’ biological defenses against the coronavirus, especially the highly transmissible Delta variant. One …

Q&A on vaccine protective effects, booster shot
3 years, 4 months ago

Q&A on vaccine protective effects, booster shot

China Daily  

The National Health Commission has responded to key public concerns about COVID-19 vaccines and disease control policies amid a resurgence of novel coronavirus fueled by the Delta variant in recent weeks. Some studies show that a booster shot delivered six to 12 months after initial immunization can markedly increase neutralizing antibodies in a short span. There isn't enough evidence now …

Q&A on vaccine protective effects, booster shot
3 years, 4 months ago

Q&A on vaccine protective effects, booster shot

China Daily  

The National Health Commission has responded to key public concerns about COVID-19 vaccines and disease control policies amid a resurgence of novel coronavirus fueled by the Delta variant in recent weeks. Some studies show that a booster shot delivered six to 12 months after initial immunization can markedly increase neutralizing antibodies in a short span. There isn't enough evidence now …

Moderna’s Covid-19 vaccine protects for at least six months, even against Delta variant, study finds
3 years, 4 months ago

Moderna’s Covid-19 vaccine protects for at least six months, even against Delta variant, study finds

CNN  

CNN — Moderna’s Covid-19 vaccine protects people for at least six months and likely longer – even against new variants, researchers reported Thursday. They tested blood from 24 fully vaccinated volunteers at several time points – four weeks after the first dose of the Moderna vaccine, and then at three points after they were considered fully vaccinated with two doses …

Q&A on vaccine protective effects, booster shot
3 years, 5 months ago

Q&A on vaccine protective effects, booster shot

China Daily  

Doses of the Chinese Sinopharm vaccine against the coronavirus disease are seen. The National Health Commission has responded to key public concerns about COVID-19 vaccines and disease control policies amid a resurgence of novel coronavirus fueled by the Delta variant in recent weeks. Some studies show that a booster shot delivered six to 12 months after initial immunization can markedly …

Q&A on vaccine protective effects, booster shot
3 years, 5 months ago

Q&A on vaccine protective effects, booster shot

China Daily  

The National Health Commission has responded to key public concerns about COVID-19 vaccines and disease control policies amid a resurgence of novel coronavirus fueled by the Delta variant in recent weeks. Some studies show that a booster shot delivered six to 12 months after initial immunization can markedly increase neutralizing antibodies in a short span. There isn't enough evidence now …

Q&A on vaccine protective effects, booster shot
3 years, 5 months ago

Q&A on vaccine protective effects, booster shot

China Daily  

Doses of the Chinese Sinopharm vaccine against the coronavirus disease are seen. The National Health Commission has responded to key public concerns about COVID-19 vaccines and disease control policies amid a resurgence of novel coronavirus fueled by the Delta variant in recent weeks. Some studies show that a booster shot delivered six to 12 months after initial immunization can markedly …

Q&A on vaccine protective effects, booster shot
3 years, 5 months ago

Q&A on vaccine protective effects, booster shot

China Daily  

The National Health Commission has responded to key public concerns about COVID-19 vaccines and disease control policies amid a resurgence of novel coronavirus fueled by the Delta variant in recent weeks. Available data shows that like other vaccines, antibody levels in vaccinated people will go down as time goes by. Six months after full immunization, neutralizing antibodies in people aged …

Q&A on vaccine protective effects, booster shot
3 years, 5 months ago

Q&A on vaccine protective effects, booster shot

China Daily  

The National Health Commission has responded to key public concerns about COVID-19 vaccines and disease control policies amid a resurgence of novel coronavirus fueled by the Delta variant in recent weeks. Available data shows that like other vaccines, antibody levels in vaccinated people will go down as time goes by. Six months after full immunization, neutralizing antibodies in people aged …

The two-shot COVID vaccines require two shots for a good reason: study
3 years, 5 months ago

The two-shot COVID vaccines require two shots for a good reason: study

Salon  

In April, the Centers for Disease Control and Prevention found that millions of Americans who received one shot of the two-dose Pfizer and Moderna vaccines never returned for their second jab. The scientists behind the study found, among other things, that while the first shot does boost SARS-CoV-2-specific antibody levels, getting a second dose boosts antibody levels to a far …

‘Breakthrough’ COVID-19 cases rising in L.A., but the vaccinated are still protected, data show
3 years, 5 months ago

‘Breakthrough’ COVID-19 cases rising in L.A., but the vaccinated are still protected, data show

LA Times  

Visitors to the Grand Central Market in Los Angeles were mostly masked on Tuesday. Los Angeles County has seen a rise in “breakthrough” coronavirus cases as of late, but data continue to show those who are vaccinated for COVID-19 enjoy vigorous protection — even from the contagious Delta variant — and are far less likely to be hospitalized should they …

Will we all need COVID vaccine booster shots?
3 years, 5 months ago

Will we all need COVID vaccine booster shots?

Al Jazeera  

As more and more people are fully vaccinated around the world, attention has turned to whether or not booster vaccines will be required to maintain immunity and to protect against emerging variants of the COVID-19 virus. by Dr Amir Khan On July 8, Pfizer-BioNTech announced that it plans to apply for emergency authorisation for a booster dose of its vaccine, …

Pfizer, Moderna Vaccines Cut Covid-19 Risk by 91 Per Cent: Study
3 years, 6 months ago

Pfizer, Moderna Vaccines Cut Covid-19 Risk by 91 Per Cent: Study

News 18  

People who receive Covid-19 vaccines by Pfizer and Moderna are up to 91 per cent less likely to develop the disease, according to a US study which also suggests that the preventives reduce the severity of symptoms and duration in those who still get an infection. The study found that mRNA Covid-19 vaccines were 91 per cent effective in reducing …

Pfizer, Moderna vaccines cut COVID-19 risk by 91 per cent: Study
3 years, 6 months ago

Pfizer, Moderna vaccines cut COVID-19 risk by 91 per cent: Study

Deccan Chronicle  

Washington: People who receive COVID-19 vaccines by Pfizer and Moderna are up to 91 per cent less likely to develop the disease, according to a US study which also suggests that the preventives reduce the severity of symptoms and duration in those who still get an infection. The study found that mRNA COVID-19 vaccines were 91 per cent effective in …

Do people who got the Johnson & Johnson COVID-19 vaccine need a booster?
3 years, 6 months ago

Do people who got the Johnson & Johnson COVID-19 vaccine need a booster?

LA Times  

Dr. Mark Ghaly, secretary of the California Health and Human Services Agency, gets a one-dose Johnson & Johnson COVID-19 vaccination by nurse LeShay Brown at the Baldwin Hills Crenshaw Plaza in Los Angeles in March. Dr. Anthony Fauci, the U.S. government’s top infectious diseases expert, said on NBC’s “Meet the Press” that there’s not enough data for the federal government …

Pfizer, Moderna Covid vaccines reduce severity, viral load in re-infected people: US study
3 years, 6 months ago

Pfizer, Moderna Covid vaccines reduce severity, viral load in re-infected people: US study

India Today  

A new study of mRNA preventives, conducted in the United States, suggests that people who contract Covid-19 even after vaccination are likely to have a lower viral load or quantity, experience a shorter duration of illness and have milder symptoms than unvaccinated individuals. Researchers also noted that while Covid-19 vaccines are proving to be highly effective in preventing infection, no …

Recovered COVID-19 patients may only need one shot of mRNA vaccines to be protected from virus
3 years, 6 months ago

Recovered COVID-19 patients may only need one shot of mRNA vaccines to be protected from virus

Daily Mail  

People who have recovered from COVID-19 may only need one shot of the vaccine, a new study suggests. Researchers from the University of California Los Angeles found that people who had been previously infected with the virus had sufficient immune responses to combat COVID-19 after only receiving one shot of a two-dose vaccine. Researchers from UCLA found that people who …

Why even with vaccines, Covid will always be with us
3 years, 6 months ago

Why even with vaccines, Covid will always be with us

Live Mint  

The road to ending the Covid-19 health crisis is long and paved with uncertainty. Many countries are counting on vaccines to build sufficient immunity in their populations so that SARS-CoV-2 isn’t able to find susceptible people to infect, causing transmission of the coronavirus to slow and eventually stop. But even with the rollout of highly effective vaccines, immunization coverage may …

Pfizer, Moderna vaccines can reduce COVID risk by 91 per cent: US CDC
3 years, 7 months ago

Pfizer, Moderna vaccines can reduce COVID risk by 91 per cent: US CDC

India TV News  

Taking two doses of the Pfizer-BioNTech and Moderna's mRNA-based vaccines, authorised by the Food and Drug Administration, can reduce the risk of coronavirus infection by 91 per cent, according to a new study by the US Centers for Disease Control and Prevention. "Findings from the extended timeframe of this study add to accumulating evidence that mRNA Covid-19 vaccines are effective …

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