The story so far: A two-year-old child in Tikrikilla, Meghalaya has been infected with vaccine-derived polio. Vaccine-derived polio is a rare condition that occurs when the weakened strain of poliovirus used in the oral polio vaccine mutates and regains the ability to cause paralysis. More about polio vaccines The first successful polio vaccine for poliovirus was made by Jonas Salk, …
Wild poliovirus type 3 has been eradicated, the World Health Organisation said on Thursday, hailing the development as an “historic achievement for humanity” that leaves only one strain of the virus in transmission. An independent panel, chaired by WHO chief Tedros Adhanom Ghebreyesus, concluded that the required criteria have been met to “verify that this strain is truly gone”, the …
