blam, you might be interested.
L
Yup, thanks. I read a pretty good article some time back that made a pretty good case that at least two (maybe three) infectious agents was involved during the Black Death.
Experts now believe that the Black Death is more likely to have been a viral infection, similar to haemorrhagic fever or ebola, that spread from person to person.Thanks Lurker.
Pneumonic plague occurs when Y. pestis infects the lungs. This type of plague can spread from person to person through the air. Transmission can take place if someone breathes in aerosolized bacteria, which could happen in a bioterrorist attack. Pneumonic plague is also spread by breathing in Y. pestis suspended in respiratory droplets from a person (or animal) with pneumonic plague. Becoming infected in this way usually requires direct and close contact with the ill person or animal. Pneumonic plague may also occur if a person with bubonic or septicemic plague is untreated and the bacteria spread to the lungs. -- CDC: Facts about Pneumonic Plague