One hundred days ago, near the end of August, I left my position as chief medical officer of the Centers for Disease Control and Prevention (CDC) alongside two colleagues. We walked out because we could no longer stay silent as scientific integrity was eroded and the nation’s public-health infrastructure was dismantled under Robert F. Kennedy Jr., Secretary of Health and Human Services (HHS). In that moment, we urged Congress, professional societies, and public-health stakeholders to intervene before irreparable damage was done. I left feeling hopeful.

For several weeks after my resignation, the nation paid attention. There was scrutiny on the misinformation coming from the Secretary, the chaos in the response to a measles outbreak, the unprecedented firing of members of the Advisory

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