States continue to report a flurry of new measles cases, with the nation on track to reach a new record number of cases since the disease was eliminated in the United States in 2000.

In California, health officials in Yolo County on June 6 confirmed a measles case in a resident of West Sacramento, marking California’s 13th case of the year. The patient is an adult with an unknown vaccination status whose source of infection is still under investigation. The patient had not traveled internationally but may have been exposed during air travel to a state without a known outbreak or may have contracted measles locally.
Officials noted that measles was recently detected in Sacramento wastewater, once in May and once in June. “An investigation into the source of the earlier detections is ongoing and it remains possible that another unknown individual with measles was present in the area,” Yolo County said in its statement.
On June 7, the Los Angeles County Department of Health said it is investigating a measles case in a resident who had recently traveled internationally. The case was linked to multiple exposure sites, which include Costco and Walmart stores.
Elsewhere, two counties in Michigan reported measles cases, including an Allegan County resident linked to exposure sites in Kent County as well as a Macomb County resident who is linked to exposures at multiple medical offices in Rochester Hills, according to a local media report.
Alabama probes suspected measles case
The Alabama Department of Public Health said it is investigating a suspected measles case in an unvaccinated person who is not yet eligible for vaccination. In a statement, it said the investigation is underway in Lee County, located in the east central part of the state.
In other developments, the Oklahoma State Department of Health on June 6 reported one more measles case, raising the state’s total to 19, which include 16 confirmed illnesses and 3 suspected infections.