Disease has always been one of nature's ways of thinning the herd, removing the weak and allowing the strong to survive and reproduce. Man has reduced the number of deaths by disease over the past 150 or so years, but nature is ever evolving and sometimes we get caught flatfooted.
Right. Mother Nature will have her due. We've held her back and kept a bunch of marginal people alive, but she'll come up with something. Obvious she doesn't like over crowding.
