Whooping cough sure is contagious. It is also the rise. There were 25,000 cases reported in 2004. We haven't seen these numbers since the 1950's, before a vacine was developed. It used to kill 5,000 to 10,000 people per year.
I'm sure this may have something to do with the ill and unchecked health of illegal aliens.
It is also on the rise! (smacking self)