Gilead Sciences headquarters in Foster City, California.   –   Copyright  AP Photo/Ben Margot The United States has bought nearly the entire world’s supply of remdesivir, one of just two drugs proven to treat COVID-19. The anti-viral drug patented by the US-based Gilead biotech firm is the only one approved by the European Medicines Agency (EMA) to treat patients with … Continue reading US buys up world’s stock of key COVID-19 drug, remdesivir