Pfizer CEO: Apparently a third dose of vaccine is needed a year after the second dose

Pfizer CEO Albert Burla said today (Thursday) that people "most likely" will need to get a booster dose of the corona virus within 12 months of being fully vaccinated against the virus. Burla further said that people will probably have to get vaccinated against the virus once a year .
Earlier in the day, the Biden administration's corona scientist, David Kessler, said Americans should expect an impulse dose that would better protect against the corona virus. Kessler told U.S. lawmakers that vaccines approved today for use protect very well, but noted that the new variants can "challenge" their effectiveness. "As of this moment, we do not know everything," he told the Corona Virus Response Subcommittee.

"We are investigating the resistance of the antibody response," Kessler said. "It seems to be strong but there is some decline and there is no doubt that the variants are challenging ... they make vaccines work harder. So I think for planning purposes only, we should expect to get a boost."

In February, Pfizer and Biontech said they were considering a third dose of the vaccine they had developed for Corona to better understand the immune response against the new variants of the virus.