Airborne SARS-CoV-2 more efficient than SARS, MERs viruses, study showsAerosolized SARS-CoV-2, the virus that causes COVID-19, remained infectious for as long as 16 hours, according to a study published yesterday in Emerging Infectious Diseases.Using nebulizers and a custom-built rotating drum, US researchers aerosolized the viruses once each in primate head-only exposure chambers or 30-liter rodent chambers in four aerobiology laboratories.They measured the short-term aerosol efficiencies of SARS-CoV-2 and compared them with those of SARS-CoV and MERS-CoV, the related coronaviruses that cause SARS (severe acute respiratory syndrome, and MERS (Middle East respiratory syndrome), respectively.