(Eric Lee/Bloomberg | Getty Images)Health and Human Services Secretary Robert F. Kennedy Jr. is testifying before the Senate finance committee Thursday. It’s been a week of chaos at the CDC. But expect a lot of questions for Secretary Kennedy about CDC leadership in disarray, his moves to overhaul federal vaccine policy, and growing calls for his resignation, including from more than a thousand current and former HHS staff. Changes to those recommendations would have huge implications for public health, insurance coverage, and availability across the country. Restoring it as the world’s most trusted guardian of public health will take sustained reform and more personnel changes,” Nixon wrote in a statement shared with NPR.