Both leaders said that even though the booster doses provide more enduring protection against the virus, they weren't the silver bullet to ending the pandemic.
“Boosters are important, but the most important thing we need to do is get more people vaccinated,” Biden said.
“Like I’ve been saying for months, these safe and effective vaccines are the way to defend ourselves and our families from this terrible virus,” said McConnell, a polio survivor.
“Now, I know it doesn’t look like it, but I am over 65 — I wish I — way over,” the president joked. “And that’s why I’m getting my booster shot today.”
Biden has championed booster doses since the summer as the U.S. experienced a sharp rise in coronavirus cases driven by the delta variant. While the vast majority of cases continue to occur among unvaccinated people, regulators pointed to evidence from Israel and early studies in the U.S. showing that protection against so-called breakthrough cases was vastly improved by a third dose of the Pfizer shot.
But the aggressive American push for boosters, before many poorer nations have been able to provide even a modicum of protection for their most vulnerable populations, has drawn the ire of the World Health Organization and some aid groups, which have called on the U.S. to pause third shots to free up supply for the global vaccination effort.
Biden said last week that the U.S. was purchasing another 500 million doses of the Pfizer vaccine — for a total of 1 billion over the coming year — to donate to less well-off nations.
Biden took questions from reporters about his vaccination experience and matters of the day as a military nurse injected the dose into his arm.
The president said he did not have side effects after his first or second shots and hoped for the same experience with his third.
Vice President Kamala Harris, 56, received the Moderna vaccine, for which federal regulators have not yet authorized boosters — but they are expected to in the coming weeks. Regulators are also expecting data soon about the safety and efficacy of a booster for the single-dose Johnson & Johnson shot.
At least 2.66 million Americans have received booster doses of the Pfizer vaccine since mid-August, according to the CDC. About 100 million Americans have been fully vaccinated against COVID-19 through the Pfizer shot. U.S. regulators recommend getting the boosters at least six months after the second shot of the initial two-dose series.
Associated Press writers Josh Boak and Lisa Mascaro contributed.