The majority of people and about 75% of those under 18 have COVID-19 antibodies from exposure to the virus, the Centers for Disease Control and Prevention said.

A CDC report Tuesday showed that “seroprevalence,” that is, the presence of antibodies, skyrocketed in young people from December 2021 through February 2022, capturing the worst of the winter omicron wave. Slightly more than 74% of adolescents 12 to 17 have antibodies, while that rate is even higher in children 11 and younger at more than 75%.