Eric Walker added a number of links to Covid-19 and aerosol transmission, and added Covid-19 and aerosol transmission to Covid-19 transmission and Aerosol transmission

Eric Walker added Covid-19 and aerosol transmission to Aerosol transmission, and added Aerosol transmission to Infectious disease (ID)

Eric Walker added a number of topics and a number of links to Infectious disease (ID), and added Infectious disease (ID) to Sickness, ailments, disease and diseases