Moderna vaccine ‘highly effective' against coronavirus variants: Study
LOS ANGELES: Two doses of Moderna Covid-19 vaccine are highly effective against SARS-CoV-2 variants, but protection against Delta infection decreases over time, according to a study conducted in the US. At the time of the study, the omicron variant had not yet been detected in the Southern California region, the researchers said. The research, published in The British Medical Journal on Wednesday, showed the vaccine was effective against Covid-19 hospitalisation associated with the Delta variant. However, vaccine effectiveness against the variant moderately declined with increasing time after vaccination. "This study confirmed effectiveness against all variants during the study period, although we did find a drop in effectiveness over time against Delta infection, from 94 per cent effectiveness in the first 2 months after vaccination to 80 per cent effectiveness after 6 months," said Katia Bruxvoort, from Kaiser Permanente, US. "Protection against hospitalisation due...