Health officials around the world are clashing over the use of certain drugs for COVID-19. That’s led to different treatment options for patients depending on where they live. On Friday, a World Health Organization guidelines panel advised against using the antiviral remdesivir for hospitalized patients. The WHO says there’s no evidence the drug improves survival or avoids the need for breathing machines. But in the U.S. and many other countries, the drug has been the standard of care because a study found it cut recovery time by about five days. Some other treatments that have been authorized for emergency use in the U.S. also remain controversial.