Which food would be safe to serve to a highly susceptible population?  Poached eggs. 

Chocolate sauce. 

Medium-rare steak. 

Alfalfa sprouts. 

This gel or liquid can be placed under the tongue of an unconscious person. this is important because you should never pour anything down the throat of an unconscious person-- s/he could choke.

Avaccine? hiv preventing, of course.

You should try to limit foods that are high in carbs and trans fats