Which of these two types of biological agents (airborne or bloodborne) is more of a personal concern to you and why?

If you work in a hospital, you can be exposed to airborne biological agents (e.g., mould and viruses) as well as bloodborne pathogens (e.g., HIV, Hep C). Which of these two types of biological agents (airborne or bloodborne) is more of a personal concern to you and why?