It is amazing that even at this stage in the pandemic we do not know how long it lasts on surfaces, nor whether it is mainly transmitted that way or via coughing/sneezing or even exhaled breath. A 60 person choir met in Washington State before movement restrictions - 45 have symptoms, 27 have tested as positive and one has died. Apparently there was no touching/handshaking/hugging, and lots of extra soap in the washrooms. So singing seems a good way to spread it. Is heavy breathing from running that different?
I think it does have a capsule, or envelope ....