Johns Hopkins University data reflects the public health reversal in defeating the vaccine-preventable disease since measles was officially eliminated from the U.S. in 2000.

It is the latest milestone in the ongoing outbreak of a disease that was once thought to be eliminated in the US.

Measles cases in the U.S. have surged to alarming levels, with over 1,200 confirmed cases this year, according to Johns Hopkins University. While Texas reports the majority, Colorado has seen 16 cases,