Sri Lanka, Aug. 6 -- The U.S. Department of Health and Human Services (HHS) said on Tuesday that it will start winding down mRNA vaccine development efforts under a federal health agency focused on developing medical countermeasures to address public health emergencies.

mRNA vaccines have been credited by public health experts with saving millions of lives during the COVID-19 pandemic, and many infectious disease experts have stressed that years of research have shown the shots are both safe and effective. But HHS Secretary Robert F. Kennedy Jr., a prominent vaccine skeptic, claimed in a statement accompanying HHS's announcement that "data show these vaccines fail to protect effectively against upper respiratory infections like COVID and...