Immunity after COVID does not appear to be long-lasting
DEAR DR. ROACH: In your recent column about the COVID-19 vaccine, you review the Pfizer vaccine results along with your suggested approach. You say: "People with a history of COVID…
DEAR DR. ROACH: In your recent column about the COVID-19 vaccine, you review the Pfizer vaccine results along with your suggested approach. You say: "People with a history of COVID…