SARS-CoV-2 transmission contact and droplet transmission of SARS-CoV-2 https://www.who.int/news-room/commentaries/detail/transmission-of-sars-cov-2-implications-for-infection-prevention-precautions https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7151430/ A SARS-CoV-2 transmission that occurs through direct, indirect, or close contact with infected people through infected secretions such as saliva and respiratory secretions or their respiratory droplets, which are expelled when an infected person coughs, sneezes, talks or sings. Note: not sure if the generation of the term with 'contact and droplet' here is a good choice. May separate 'contact' and 'droplet'. See ref: https://www.who.int/news-room/commentaries/detail/transmission-of-sars-cov-2-implications-for-infection-prevention-precautions. https://apps.who.int/iris/bitstream/handle/10665/112656/9789241507134_eng.pdf Oliver He