The spread of measles is showing no signs of slowing down in Mexico. Experts and health officials in Mexico have warned that the virus’s speed of transmission appears to be increasing. The border state has reported 3,490 cases, which represents 93 percent of the total for the country. So far, a total of 7,086 probable cases have been counted, in 82 municipalities across 20 states of the country. Over the last week, state health authorities have vaccinated around 42,000 people against measles.