A drug called hydroxyurea has long been used to fight sickle cell disease, but some female patients may have shied away from it due to concerns that it could harm future fertility. Those fears may be unfounded: A new study finds that hydroxyurea has no effect on what’s known as “ovarian reserve” — the number…  read on >  read on >

The U.S. Food and Drug Administration on Thursday authorized the sale of the country’s best-selling e-cigarette. The agency’s decision only applies to several tobacco-flavored versions of the reusable product, sold as Vuse. In January 2023, the FDA rejected R.J. Reynold’s application for its more popular menthol flavor, but the company has challenged that ruling in…  read on >  read on >

Cancer growth can be fueled by flecks of ancient viral DNA lodged into the genetics of modern humans, a new study says. Overall, about 8% of the human genome is made of bits of DNA left behind by viruses that infected our primate ancestors, researchers say. Called “endogenous retroviruses,” these DNA fragments have long been…  read on >  read on >