U.S. actor Michael Douglas begins chemotherapy after doctors discover a tumor in his throat.
The United States Food and Drug Administration approves marketing of a cooling cap system to reduce hair loss in female breast cancer patients during chemotherapy. The DigniCap scalp cooling system, a product first available in Sweden in the 1990s, produces near-freezing temperatures that make it harder for cancer-fighting drugs to reach and harm hair follicles. [https:--www.usnews.com-news-politics-articles-2015-12-08-fda-clears-cold-cap-to-save-hair-during-breast-cancer-chemo (AP via U.S. News and World Report)] [http:--www.fda.gov-NewsEvents-Newsroom-PressAnnouncements-ucm476216.htm (FDA)] [http:--www.dignicap.com-dignitana-fda-clearance- (DigniCap)]date=August 2019
Iran's Supreme Leader Ayatollah Ali Khamenei approves the nuclear deal between Tehran and world powers, and orders it to be implemented subject to certain conditions. The letter states the United States and European Union should clearly announce the elimination of sanctions against Iran. The imposition of sanctions at any level and under any pretext from any of the negotiating countries would violate the JCPOA.
A group of American scientists at Washington University announce in a study published in the journal "Neuron" that they have identified a number of genetic markers that are associated with increased risk of Alzheimer's disease.
An analysis of the FBI's scientific work in the investigation of the 2001 anthrax attacks on the United States finds that the Bureau overstated the strength of the links to a supply held by Bruce Ivins.