Given the emergence of multiple new SARs-COV-2 variants, health authorities are extremely concerned about vaccine efficacy. The Delta variant, which is a possible driving force of the second wave of COVID-19, is said to be highly infectious and transmissible, which can also cause breakthrough infections.Is there a need for a COVID booster shot? Here’s what WHO says
Given the emergence of multiple new SARs-COV-2 variants, health authorities are extremely concerned about vaccine efficacy. The Delta variant, which is a possible driving force of the second wave of COVID-19, is said to be highly infectious and transmissible, which can also cause breakthrough infections.
