Kaitlan Collins @kaitlancollins
"The 2nd dose induces a level of virus neutralizing antibodies about 10-fold greater than the first dose,” said Dr. Paul Offit. “Also, the 2nd dose induces cellular immunity, which predicts not only longer protection, but better against variant strains.” https://t.co/bpczMOd9je — PolitiTweet.org