Pfizer said it's seeing waning immunity from its Covid-19 vaccine and plans to develop a booster dose. Hours later, the CDC and FDA say Americans don't need booster shots yet.
Drugmaker Pfizer said Thursday it is seeing waning immunity from its coronavirus vaccine and says it is picking up its efforts to develop a booster dose that will protect people from variants.
It said it would seek emergency use authorization from the US Food and Drug Administration for a booster dose in August after releasing more data about how well a third dose of vaccine works.But in an unusual move, two top federal agencies said Americans don't need boosters yet and said it was not up to companies alone to decide when they might be needed.
"The first batch of the mRNA for the trial has already been manufactured at BioNTech's facility in Mainz, Germany. The Companies anticipate the clinical studies to begin in August, subject to regulatory approvals."
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