Moderna says its experimental COVID-19 vaccine, combining its original shot with protection against the Omicron variant, appears to work.
Preliminary results show people given the jab experienced a higher boost in Omicron-fighting antibodiesAntibodies wane over time, so it is not clear how long protection could last
"We believe strongly that this data supports an update of the vaccine," Moderna's president Dr Stephen Hoge said.Experts say they still provide strong protection against severe disease, hospitalisation and death, even after the appearance of the Omicron variant — especially if people have had an initial booster dose.
Pfizer is also studying a combination shot, also called sa bivalent vaccine, with some data expected later this month.