How effective is the COVID-19 vaccine ?
The effectiveness of the COVID-19 vaccine varies depending on the type of vaccine and the population being vaccinated. mRNA vaccines have an efficacy rate of around 95% against hospitalization and death due to COVID-19, while adenovirus vector vaccines have an efficacy rate of around 66% and inactivated virus vaccines have an efficacy rate of around 70%. Older adults and people with underlying health conditions may require additional doses or booster shots to achieve optimal protection against severe cases of COVID-19. Populations with higher rates of transmission may also require additional doses or booster shots to achieve optimal protection against COVID-19.