At a Glance Southern ticks tend to choose lizards, mostly skinks, as their hosts.Lizards don't transmit Lyme disease bacteria as efficiently as small mammals.A big drop-off in the number of cases of Lyme disease happens south of Virginia. Lyme disease affects in the U.S. and most of the cases turn up in the Northeast even though the black-legged ticks that spread it can be found across the entire country. Lizards may be the reason for that geographic discrepancy, new research...

A flu vaccine syringe rests on a table at a flu vaccination clinic Oct. 14, 2020, in Lakewood, California. (Mario Tama/Getty Images) At a Glance The first flu vaccine was licensed for civilian use in the U.S. in 1945.Dr. Jonas Salk was one of the lead researchers.Nearly 200 million doses of vaccine were expected to be manufactured this flu season. The 1918 influenza pandemic infected an estimated 500 million people worldwide and left 675,000 people dead in the United States,...

The Weather Channel's Mark Elliot looks at way to keep from getting skin cancer if you spend time in the sun. ...