Makary echoes previous health officials who believe herd immunity is possible by April.
The doctor compared the reaction to the kind of allergic reaction he has with shellfish.
The US is looking at why several people who received the Pfizer-BioNTech coronavirus vaccine have developed allergic reactions, according to a report.
After the first round of COVID-19 vaccines is administered to those at the top of the priority list, it will likely be possible for people to jump the...