Researchers on Wednesday urged governments to delay administering the second dose of Pfizer Inc’s COVID-19 vaccine, which they said had an efficacy of 92.6% after the first dose.
The researchers, Danuta Skowronski and Gaston De Serres, said their findings were derived from Pfizer’s documents submitted to the U.S. Food and Drug Administration.
These findings were also similar to the first-dose efficacy of 92.1% reported for Moderna Inc’s mRNA-1273 vaccine, Skowronski and De Serres said in their letter published in the New England Journal of Medicine.
They cautioned that there may be uncertainty about the duration of protection with a single dose, but said that the administrat…
Keep on reading: Researchers urge delay in administering Pfizer vaccine’s second dose