Canada's most populous province is fighting a measles outbreak even bigger than the one in Texas and New Mexico. Public Health Ontario said Thursday that more than 100 new cases were reported in the last week, bringing the total of confirmed and probable cases reported since October to 572, reports CP24. The sharp rise is "due to continued exposures and transmission among individuals who have not been immunized," the health agency said. Dozens more cases have been reported in other provinces, making the outbreak the country's largest since 2011. No deaths have been reported but authorities in Ontario say 42 measles patients, most of them unvaccinated children, have been hospitalized, including two in intensive care.