Is Pfizer's Covid vaccine less effective than previously believed in 5- to 11-year-olds?
On Monday, a paper that suggested as much was posted on a server by researchers with the New York State Department of Health; that paper has yet to be peer-reviewed. On top of the vaccine being delayed for children under the age of 5, the news came as a major disappointment to parents. The paper suggested that there has been a rapid decline in protection after vaccination among the youngest cohort of children eligible for vaccination, dropping off more quickly than the declines seen in slightly older children aged 12 to 17.
