Article snapshot taken from Wikipedia with creative commons attribution-sharealike license.
Give it a read and then ask your questions in the chat.
We can research this topic together.
This is an old revision of this page, as edited by 172.137.200.110 (talk) at 21:04, 24 September 2007 (i put the word turdheads that describes how a lung can get infected). The present address (URL) is a permanent link to this revision, which may differ significantly from the current revision.