Gavi: Giving kids multiple vaccines together is proven to be safe, according to decades of safety data.

Why are children given so many vaccines in the first few months of life, and then again around the time they start school? Essentially, it’s because that’s when they’re most at risk and need lifesaving vaccines.

Young children have developing immune systems that won’t have encountered most bacteria or viruses, making them extremely vulnerable to vaccine-preventable diseases. The childhood vaccine schedule is designed to protect infants and children at the times they are most at risk, and it is backed by decades of testing and safety monitoring.