The bivalent vaccine uses components of two strains of the virus – the original strain of Covid-19, and the Omicron variant, which is causing most Covid infections in Aotearoa currently.
This is a companion discussion topic for the original entry at https://www.sciencemediacentre.co.nz/2023/02/23/omicron-specific-vaccine-approved-for-over-30s-expert-reaction/?utm_source=rss&utm_medium=rss&utm_campaign=omicron-specific-vaccine-approved-for-over-30s-expert-reaction