Dan Barouch, MD, PhD (Center for Virology and Vaccine Research, BIDMC), lead researcher on the Johnson & Johnson COVID-19 vaccine candidate, discussed the level of protection after receiving the first dose of a COVID-19 vaccination, how long people should still wear a mask, and a strategy shift to reach herd immunity.

NBC Boston 10 – January 11, 2021

What happens after the first COVID-19 dose?