Air Droplets

A fictional app that detects if air in the environment is safe to breathe.

Air droplets supposedly can linger in the environment longer than presumed. This allows people to test both indoor and outdoor air quality. Loved ones could be tagged as safe so that the app only detects unknown droplets.

I have no idea if something like this would be possible in real life. For now, my wife and I walk on the grass when the trails seem too crowded. Fortunately, people in our neighborhood are being safe and respectful.