COVID-19 vaccines are safe and effective. COVID-19 vaccines are undergoing the most intensive safety monitoring in U.S. history, including studies in children ages 5 years and older. Like adults, children may have some mild vaccine side effects, such as tiredness, headache, or a sore arm, which could affect their ability to do daily activities. Side effects should go away in a few days. Your child cannot get COVID-19 from any COVID-19 vaccine. Learn more: https://www.cdc.gov/coronavirus/2019-nco