robust(6) provided(6) provide(6) heterogeneity(6) collected(6) Infection(6) COVID-19(6) Precipitation(3) released(3) Surveillance(3) Control(3) Consensus(3) direction(3) SARS-CoV-2(3) include(3) COVID-19 cases(3) infected individual(3) ambient(3) Relative risk(3) Department(3) risk of transmission(3) response(3) location(3) investigated(3) public interest(3) fixed(3) detection(3) nitrogen dioxide(3) overcome(3) Health(3)