Trump Taps Vaccine Skeptic RFK Jr. to Lead HHS. Moderna, Novavax Stock Slide. Trump Taps Vaccine Skeptic RFK Jr. to Lead HHS. Moderna, Novavax Stock Slide. · Barrons.com Josh Nathan-Kazis Thu, Nov 14, 2024, 2:55 PM 3 min read In This Article: NVAX -7.02% MRNA -5.62% The prospect of Kennedy leading HHS or a similar agency has cast major uncertainties over the health system. Continue Reading View Comments Terms and Privacy Policy WA Consumer Health Privacy Policy Your privacy controls Recommended Stories