The acting director of the US Centers for Disease Control and Prevention (CDC) has endorsed comments made by President Donald Trump, calling on parents to request that the measles, mumps, and rubella (MMR) vaccines be given to their kids as three separate shots, known as monovalent vaccines. The rest of this article is behind a paywall. Please sign in or subscribe to access the full content.

The CDC, guided by the Advisory Committee on Immunization Practices (ACIP), just announced it will adopt new recommendations on MMR vaccination. Previously, young kids had the option of receiving the MMR combined with the chickenpox (varicella) vaccine, known as the MMRV. This is no longer recommended for a child’s first dose, typically given at 12 months.

But acting director Jim O’Neill has gone a

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