Environmentally acquired infections can be dangerous, and they can be acquired via multiple routes, and their risks can be mitigated –
https://sportsmedicine-open.springeropen.com/articles/10.1186/s40798-019-0208-x
Infection from Outdoor Sporting Events—More Risk than We Think? Jamie E. DeNizio & David A. Hewitt; Sports Medicine – Open volume 5, Article number: 37 (2019)
Public Health News and Views 