NPR is providing health advice on how to demonstrate in the age of Covid. I quote these health tips without comment:
Some health experts, even as they urge caution, said they support the demonstrations — because racism also poses a dire health threat.
Health experts urged protesters not to sing and shout to reduce the threat of person-to-person transmission. And they cautioned that police tactics such as tear gas and pepper spray could exacerbate the situation by prompting people to cough and gasp for air.
The New York City Department of Health and Mental Hygiene issued a list of tips for demonstrators to lower their risk of contracting COVID-19, such as covering their faces and staying in small groups. "Don't yell; use signs & noise makers instead.. . Some of these tips can be difficult to follow. For example, if you are angry or frustrated about an issue, you want to express that feeling, and speaking is one way of doing that."