Is the time-space trajectory overlapping infection rate high?

Good protection can effectively reduce the infection rate.

1, you don't wear a mask, and the confirmed cases don't wear a mask. When you have an intersection, the probability of infection is 90%. 2. You have a mask. Have you confirmed the case? When you cross paths, the infection rate is 30%. 3. You don't have a mask, and the confirmed case has a mask. When you have an intersection, the probability of infection is 5%. 4. You brought a mask, and the confirmed case also brought a mask. When you overlap, the infection rate is 1.5%. 5. You brought a mask, and the confirmed case also brought a mask. Keep the distance above 1.8 meters. When you have an intersection, the probability of infection is zero.