It appears that two doses of COVID-19 vaccine aren’t going to be enough. Last week, Pfizer’s CEO announced that a third dose could be needed within a year, followed by a single annual dose. On the heels of all that comes the news that Moderna is expected to have a third “booster shot” ready by the fall.
While a third dose of the vaccine is not yet required, health experts seem to agree it could offer immunity against variants of the virus. Per CBS, those variants are beginning to rise in the U.S. and several other nations.
On top of that, there’s yet to be any hard evidence that those who are fully vaccinated are totally immune to COVID-19, as neither Pfizer nor Moderna have claimed that the vaccines offer 100% immunity.