If you keep the positive look like are keeping healthy by exercising. When talking about your fitness level, proper nutrition, supplements, cardio, and weight training are all important factors, but it is your attitude that determines how hard you focus on each of those areas. Attitude is very important just keep your attitude positive.
There are numerous diseases and viruses that can be contracted from airborne germs. Out of the choices given here, the answers will be the flu and strep throat. Both are highly contagious.
I think it has had a positive effect.
Hope this helps.