The agency kept Covid shots on the schedule for healthy children 6 months to 17 years old, but added a new condition. Children and their caregivers will be able to get the vaccines in consultation with a doctor or provider, which the agency calls “shared decision-making.”

The shots will also remain available under those terms to about 38 million low-income children who rely on the Vaccines for Children program, according to an emailed update from the C.D.C. on Friday.