If you are planning to start a new career. Consider becoming a Public-Health Microbiologist.

So what a Public-Health Microbiologist does?

Here is a short description:

Conducts experiments to detect presence of harmful or pathogenic bacteria in water, food supply, or general environment of community and to control or eliminate sources of possible pollution or contagion: Makes periodic laboratory counts of bacteria in water supply. Analyzes samples of sewage for harmful micro-organisms and for rate of sludge purification by aerobic bacteria. Examines milk, shellfish, and other food items for micro-organisms constituting menace to public health. Cooperates with hospitals and clinical laboratories in identifying micro-organisms taken from diseased persons to determine presence of bacteria causing contagious or epidemic diseases. May inoculate members of community against contagious diseases.