Pollen season has been so brutal this year, even the brightest allergy doctors couldn't have forecast the shocking effects: buildings have crumbled, small children have experienced freak growth spurts, Kelis even turned into a dog. Most ominous of these symptoms have been the copious sneezes, of which new types are being identified every single day. The above few are some of the most deadly; keep this chart handy so you know what to avoid.