More than 90% of Britons develop antibodies to coronavirus after having one dose of the AstraZeneca or Pfizer vaccines, and almost 100% do so after their second jab, research shows.
The findings, based on a study of 8,517 people in England and Wales, are the latest evidence to show that the two mainstays of Britain’s vaccine drive are proving highly effective.
The research found that 96.42% of people who had either vaccine had developed antibodies 28 to 34 days after their first dose. That rose to 99.08% within seven to 14 days of the second jab.
Both vaccines were equally good at triggering the antibodies needed to fight off Covid-19, the researchers from University College London (UCL) found.