Pfizer to seek go-ahead for third Covid-19 vaccine dose

Research from multiple countries shows the Pfizer shot and other widely used vaccines offer strong protection against the highly contagious Delta variant, which is spreading rapidly around the world.

Pfizer is to seek authorisation for a third dose of its Covid-19 vaccine, saying that another shot within 12 months could dramatically boost immunity and maybe help ward off the latest variant.

Research from multiple countries shows the Pfizer shot and other widely used vaccines offer strong protection against the highly contagious Delta variant, which is spreading rapidly around the world.