• A group of 239 researchers from 32 countries draft a letter to WHO, calling for it to declare that COVID-19 is airborne and can be transmitted by aerosols, particles that are smaller than large respiratory droplets. A switch will require different and more rigorous indoor infection control methods such as revamped indoor ventilation systems and ultraviolet lighting. Source
• WHO discontinues the use of hydroxychloroquine and LPV/r in the SOLIDARITY trial after a recommendation from its International Steering Committee, based on evidence that these drugs made little or no difference in mortality vs. standard of care. Source
