Why it takes 2 weeks for the Covid vaccines to kick in
The FDA-authorized Covid vaccines are, in some ways, like Spiderman.
"When Peter Parker gets bitten by a radioactive spider, he's not able to climb walls right away," said Dr. Vince Silenzio, an M.D. and professor in the Rutgers School of Public Health. Similar to the bite that endows Parker with certain spider-like...
