Interview with Dr. Jose-Luis Jimenez, aerosol scientist, on the airborne nature of the SARS-CoV-2 virus - a The Spanish-born fields of last year an open letter to the World Health Organization (WHO) and Center for Disease Control and Prevention (CDC) urging them to acknowledge that airborne aerosols are critical in the transmission of the SARS-CoV-2 virus. CDC and WHO official guidance continued to emphasize respiratory droplets as the main route of transmission. Respiratory droplets are small bits of saliva or respiratory fluids that infected individuals expel when then cough, sneeze, or speak. Though they are propelled through the air, they quickly fall to the ground