“The worst possible case”:
Robert F. Kennedy Jr.’s impact so far

The article offers an in-depth examination of the sweeping and controversial changes implemented during Kennedy’s tenure as Secretary of Health and Human Services. Kennedy, a polarizing figure, has moved to wind down nearly $500 million in federal BARDA contracts related to mRNA vaccines—programs that had been central to COVID-19 and influenza preparedness. While he argues mRNA is less effective for respiratory viruses, health experts strongly dispute this. His rhetoric has alarmed the medical community and sown doubt about established public health practices. The repercussions of Kennedy’s policies go far beyond rhetoric. Under his leadership, the CDC narrowed its COVID-19 vaccination recommendations—limiting use for children and some healthy pregnant women—and FDA Emergency Use Authorizations were adjusted accordingly. These moves have not only fueled skepticism about pandemic response but, according to experts, risk undermining trust in long-standing immunization programs, including those for measles and polio. The reporting also highlights how Kennedy’s stance has...