How many people are vaccinated each year?

The number of people vaccinated each year varies widely depending on factors such as global health initiatives, outbreaks of diseases, and vaccine availability. In recent years, hundreds of millions to over a billion people are vaccinated annually for various diseases, including routine childhood vaccinations and seasonal flu shots. For instance, during the COVID-19 pandemic, billions of vaccine doses were administered worldwide. The World Health Organization (WHO) and other health organizations continuously monitor vaccination rates to improve coverage and address public health needs.