Antivaccine propaganda has been spreading. As a result, so has the measles. Antivaccine zealots are not worried by measles outbreaks. Instead, they want even more people to catch the measles. These antivaxxers believe that measles is a harmless disease that boosts the immune system. (In reality, measles is dangerous mainly because it damages the immune system.) Lately, antivaxxers have been spreading the myth that in the old days, parents would send their children to “measles parties” at the home of a measles patient. In reality, someone from the local board of health would post a quarantine sign on the patient’s home, to prevent any “measles party” from taking place.