COVID-19: Current vaccines may need to be updated, experts warn

Current COVID-19 vaccines may need to be updated to ensure their continued effectiveness against Omicron and future variants, an expert group appointed by the World Health Organization (WHO) said on Tuesday. 

Current COVID-19 vaccines may need to be updated to ensure their continued effectiveness against Omicron and future variants, an expert group appointed by the World Health Organization (WHO) said on Tuesday.