Pfizer COVID-19 booster 'highly effective'

Updated October 21 2021 - 10:28pm, first published 10:23pm
The Pfizer booster works against the highly contagious Delta variant, the company says.

A booster dose of the COVID-19 vaccine developed by Pfizer and German partner BioNTech SE was 95.6 per cent effective against the coronavirus when compared with a vaccinated group that did not get the third shot, data from a large study released by the companies shows.