- Airplanes
- Cruise ships
- Nursing homes
- Hospitals
- Concerts
- Marathons
- Public mass transit
- Shopping malls
- Any crowded spaces
There are two main factors to be aware of. Time and distance. You want to spend as little time as possible in close proximity to other people.
In your home with family members practicing avoidance are OK to be around. People moving around and coming in contact with others is the chain of transmission. Especially people not practicing avoidance or mask wearing. There is a risk that people without any symptoms are actively spreading infection to others without anyone knowing it.
When people speak, sing, sneeze or cough, maybe just breathing, virus can be transmitted. Viruses are very small in physical size. It is unknown how much virus is needed for infections to take place.
Better safe than sorry. Be careful out there.