Pfizer Inc. Chief Executive Albert Bourla said it is likely that people who receive Covid-19 vaccines will need booster shots within a year afterward, and then annual vaccinations, to maintain protection against the virus as it evolves.
“The variants will play a key role. It is extremely important to suppress the pool of people that can be susceptible to the virus,” Mr. Bourla said during a virtual event hosted by CVS Health Corp. that aired Thursday but was recorded April 1.
“There are vaccines like polio where one dose is enough,” Mr. Bourla said. “And there are vaccines like flu that you need every year. The Covid virus looks more like the influenza virus than the polio virus.”
More research is required to confirm the need for annual booster shots, he said. But he added that the need appeared likely given research so far.
The chief executive’s comments come as the U.S. and other countries race to vaccinate as many people as possible and try to stay ahead of any variants that could evade the shots.
