NEW YORK, New York: Those who have been inoculated against COVID-19 with the Pfizer vaccine will likely need a third dose as early as within one year, according to Pfizer CEO Albert Bourla.
Pfizer vaccines recipients may also need annual booster shots to continue protecting them from the Coronavirus, Bourla told CNBC on April 15.
"A likely scenario is that there will be a need for a third dose, somewhere between six and 12 months, and then from there there will be an annual revaccination," Bourla said.
However, "all of that needs to be confirmed and, again, the variants will play a key role," he noted, as reported by CNBC.
The Pfizer-BioNTech vaccine, which was granted an emergency use authorization by the U.S. Food and Drug Administration in December. It was found to offer 95 percent protection against Covid infections for up to six months.
New virus variants could diminish the vaccine's immunity. However, the Pfizer vaccination has proven effective against the British variant of Covid.
Besides Bourla, during recent testimony before the U.S. Congress David Kessler, who heads the U.S. COVID-19 response team, agreed that a third vaccination might well be needed.
Of note, Moderna officials said on April 30 that its vaccine protects for only six months, and the company is developing a booster.
Also, officials from Johnson & Johnson recently said its single-shot vaccine will likely need to be given annually.