Delay in getting 2nd shot of Pfizer COVID-19 vaccine produces more antibodies: UK study
Our study demonstrates that peak antibody responses after the second Pfizer vaccine are markedly enhanced in older people when this is delayed to 12 weeks, Helen Parry, an author of the study based at the University of Birmingham, said
Reuters | May 14, 2021 | Updated 11:12 IST
Pfizer's COVID-19 vaccine generates antibody responses three-and-a-half times larger in older people when a second dose is delayed to 12 weeks after the first, a British study said.
The study released on Friday is the first to directly compare immune responses of the Pfizer shot from the three-week dosing interval tested in clinical trials, and the extended 12-week interval that British officials recommend in order to give more vulnerable people at least some protection quickly.