Flu activity remains "elevated" in the U.S. but is starting to show signs of abating, according to new CDC data published Friday.

In one of Robert F. Kennedy Jr.’s first moves as secretary of the US Department of Health and Human Services, the agency released guidance Wednesday for the US government, external partners and the public that offers a narrower definition of sex than the ones used by many scientists and that aligns with a January executive order signed by President Donald Trump.

Bracing frigid temperatures, crowds of former and current federal workers protested the deep cuts to HHS, warning it will permanently set back scientific progress.

Nouri founder and CEO Caroline Carralero joins ‘America’s Newsroom’ to discuss what she expects of Health Secretary Robert F. Kennedy Jr.

Bird flu infections were detected among cattle veterinarians tested last fall, including two people with no known exposure to animals with the virus, according to a report released by the U.S. Centers for Disease Control and Prevention on Thursday.

"We just cannot take this," one scientist said, as UMass Chan Medical School stands to lose about $41 million in annual funding.

During this week, of the 4,377 viruses reported by public health laboratories, 4,264 and 113 were influenza A and B, respectively. Of the 3,458 influenza A viruses subtyped, 53.7 percent were influenza A (H1N1)pdm09 and 46.

Colorado research biologist Joe Cardiello was excited about being involved in what could become lifesaving research for people who have been impacted by Lyme disease.