<unk> s are vaccines developed to protect against<unk> . As of 2020 they are not commercially available. One<unk>  consisted of formaldehyde-inactivated Rickettsia prowazekii. Two doses were injected subcutaneously four weeks apart. Booster doses were required every six to twelve months.
Typhus vaccine
Typhoid vaccine
Anthrax vaccines
Polio vaccine
Measles vaccine
Tetanus vaccine
Influenza vaccine
Mumps vaccine