Probability & Odds of Contracting COVID-19: Location and Blood Type Location Probability Odds Masks? Talking? Notes X Y Crowded Movie Theater, 14% No No Poor ventilation, no masks & no talking poor ventilation 54% No Yes Poor ventilation, no masks & talking 5.3% Yes No Poor ventilation, with masks & no talking 24% Yes Yes Poor ventilation, with masks & talking Gym, heavy exercise, 99% No Yes Poor ventilation, no masks & talking Poor ventilation Gym, short workout, 17% No Yes Good ventilation, no masks & talking good ventilation 67% No Yes Poor ventilation, no masks & talking Blood Type Probability Odds X Y O Blood Type 2.1% B+ Blood Type 4.2%