Does bigfoot get sick?

If we assume that bigfoot is a mammal, then we can conclude that the species is susceptible to parasites and diseases that are common among other mammals. Some common mammalian diseases include rabies, hemorrhagic fever, and the plague (yes- the plague still exists and cases are reported yearly in the the US). The presence of such diseases increases the odds of finding bigfoot that are acting abnormally (such as being conspicuous), that are severely weakened, or have died in unusual and obvious places. Of course, its doesn't guarantee that we will observe any of this, but it does improve the odds.

I'll let the reader draw their own conclusions from this tidbit of information.