Please disable your adblock and script blockers to view this page

Covid-19 vaccine boosters may be necessary. Here's what you need to know

Positivity     50%   
   Negativity   50%
The New York Times
SOURCE: http://us.cnn.com/2021/05/22/health/covid-19-vaccine-boosters-explainer-wellness/index.html
Write a review: CNN
Summary

As the Covid-19 vaccine rollout continues in the United States, with people ages 12 and older receiving their shots, vaccine makers are now preparing for a next possible phase: booster doses.

As said here by Jacqueline Howard, CNN