It depends on which infection you are talking about, if you are talking about sexual infections the answer would be April Butler.
Infections in the middle ear can sometimes spread through the mastoid bone.
Yes, they can.
how does infections spread in hospitals
Both bacterial infections and viral infections can be contagious or not contagious. Some viral infections are not spread from human to human or are only rarely spread that way. TB is a contagious bacterial infection.
airborne droplets
bacteria
Pseudomonas infections can be spread within hospitals by health care workers, medical equipment, sinks, disinfectant solutions, and food.
viruses
Bacteria.
Gargling with salt water can slow the spread of mouth infections.
The nervous system
sexual contact