HHS has sued Gilead for patent infringement after the drug manufacturer repeatedly refused to obtain licenses for HHS patents on an HIV medication. The suit , filed in federal court in Delaware, alleges Gilead willfully infringed on patents given to HHS meant to protect the government’s work in developing pre-exposure prophylaxis (PrEP), and has profited from research funded by taxpayers through the sale of the brand-name drugs Truvada and Descovy, according to HHS. The department says that Gilead originally gained...