Each year thousands of babies born in Guinea-Bissau, one of the world’s least developed countries, are exposed to hepatitis B, a virus that can cause severe liver damage and cancer.
The groups, including the American Academy of Pediatrics, say the C.D.C.’s revised vaccine schedule is not based on scientific evidence and will harm the public.
Bypassing longstanding protocol for vaccine decisions, Robert F. Kennedy Jr. and the Health Department cut the number of vaccines recommended for children to 11 from 17.
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