Washington-According to a count at John’s Hopkins University, the USA is currently experiencing the worst measles epidemic in over 30 years. Since the beginning of the year, 1,277 confirmed cases of the contagious disease have been reported, the US University said on Monday. This is the highest number since 1992. According to the information, 40 of the 50 US states are affected. It is worst in Texas in the southwest of the country, where more than 60 percent of the cases have been registered.