People are paying as much as $10,000 for an unlicensed remdesivir variant for their cats, in a thriving black market linked to Facebook groups

· A variant of remdesivir, one of the most promising treatments for COVID-19, has for more than a year been sold as a treatment for sick cats via a black market connected to big Facebook groups.
· The drug, called GS-441524, is being sold as a purported cure for Feline Infectious Peritonitis, which is caused by a coronavirus,...