After the 5th booster of the original they moved to what you will hear called "Bivalent" two mRNA pieces of code. lol
The bivalent COVID-19 vaccines have two mRNA components: one of which corresponds to the original strain of the virus that is broadly protective against COVID-19 and the other corresponds to the omicron variant BA.4 and BA.5 lineages to provide better protection against COVID-19 caused by the omicron variant.
After the 5th booster of the original they moved to what you will hear called "Bivalent" two mRNA pieces of code. lol
The bivalent COVID-19 vaccines have two mRNA components: one of which corresponds to the original strain of the virus that is broadly protective against COVID-19 and the other corresponds to the omicron variant BA.4 and BA.5 lineages to provide better protection against COVID-19 caused by the omicron variant.