Nine out of 10 people over 80 still had strong signs of coronavirus immunity six weeks after their first vaccine dose, a study has found. And both AstraZeneca and Pfizer's jabs work equally well at forcing the body to make antibodies that can fight off the disease. University of Birmingham research»»»

A single dose of either the Oxford/AstraZeneca or the Pfizer/BioNTech vaccine generates a big protective antibody response against the coronavirus in people 80 and over, researchers have found. The first study to look at the comparative performance of the two vaccines that have been in use in the U»»»

LONDON (Reuters) - The first study to directly compare immune reactions between Pfizer’s and AstraZeneca’s COVID-19 vaccines found strong and broadly similar antibody responses in over-80-year-olds after a first dose of either shot, scientists said on Wednesday. The UK study also found that a criti»»»