RE: Vaccine16 Nov 2020 20:55
“In addition, the protective effect of a vaccine may take at least one month, if not slightly longer," says Dr. David Ho, a virologist working on developing monoclonal antibody therapies for Covid-19 at Columbia University. (So far, Pfizer said early results showed its two-dose vaccine showed 90% effectiveness seven days after the second dose. Early data on Moderna's two-dose vaccine showed 94.5% efficacy two weeks after the second dose.)
"Therefore, for the foreseeable future, we will need to continue our mitigation measures, including wearing masks," Ho says, noting that precautionary measures will likely last "for much of 2021."