Pfizer, Moderna booster is up to 90% effective against Omicron

Booster shots of the Pfizer-BioNTech and Moderna vaccines have proven highly effective at preventing Omicron-related hospitalisations, according to three new studies by the US Centers for Disease Control and Prevention.

The booster doses were 90 percent effective at keeping people out of hospital after they had become infected with the Omicron variant.