Moderna Begins Omicron-Specific Vaccine Trials After Pfizer-BioNTech

US biotech company Moderna announced on Wednesday that it has begun clinical trials of a booster dose of vaccine designed specifically to combat the Omicron variant of the coronavirus.

source https://www.ndtv.com/world-news/coronavirus-coronavirus-vaccine-covid-vaccine-moderna-begins-omicron-specific-vaccine-trials-after-pfizer-biontech-2731842