I wanted to help but I can’t read the article.
If the disease is communicable, it is contagious. If it is airborne, it is transferred through the air, as opposed to physical touch or blood-borne. Being in a confined space, such as an ambulance, with an airborne communicable disease means you have most definitely been exposed to it.
If I am not mistaking it would be 9-10 hours
The answer is A Depression