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Health Secretary Robert F. Kennedy Jr. appointed eight new members to the US Preventive Services Task Force, an influential body that sets insurance coverage standards for preventive care like colonoscopies. Doctors raised alarm that the new appointees are largely specialists rather than experts in preventive care and general medicine, a departure from past practice. Critics worry the shakeup could alter which preventive services insurers are required to cover, with wide-reaching implications for patient access to screenings and care.