As new data continues to come out, doctors are learning more and more about COVID-19 vaccines. Pfizer is still doing clinical trials and just released new data saying its two-dose vaccine remains 91 percent effective for at least six months.…
As new data continues to come out, doctors are learning more and more about COVID-19 vaccines. Pfizer is still doing clinical trials and just released new data saying its two-dose vaccine remains 91 percent effective for at least six months.…