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The CDC, under new acting director Jim O'Neill, has revised vaccination schedules. Children under four will now receive separate shots for chickenpox and MMR, replacing a combination vaccine. For adults under 65, the updated COVID-19 vaccine recommendation is now an individual decision in consultation with healthcare providers. These changes, made after a recent overhaul of the Advisory Committee on Immunization Practices, have drawn criticism from mainstream medical groups concerned about vaccine efficacy and data representation.

Prepared by Olivia Bennett and reviewed by editorial team.