Closing schools in Michigan because parents believe that they shouldn't vaccinate their children. Why on earth would they think that?
This means anti-vaccination reasons. And you know how I feel about that. Virtually every claim made by anti-vaxxers is wrong, or a gross distortion of the truth. The actual truth about vaccines is that they are extremely effective and their risks are minimal.
Read the rest of the story with links @ Pertussis and measles Outbreaks in Michigan.