Human-to-human transmission of<unk>  typically occurs through the air when an infected individual coughs or sneezes. Breathing in particles released from the infected individual leads to infection. Contact with any lesions on the skin can also lead to transmission of<unk> , but this is uncommon. Indirect infections can occur, as well. If an infected individual touches a surface or object, the bacteria can be left behind and remain viable. Also, some evidence indicates<unk>  has the potential to be zoonotic, but this has yet to be confirmed. Corynebacterium ulcerans has been found in some animals, which would suggest zoonotic potential.
Diphtheria
Spanish flu
Swine influenza
Plague 
Anthrax
Periodic fever syndrome
Murine typhus
Influenza