As cyclosporiasis cases near 7,000 in the US, health officials warn to avoid lettuce from certain Taco Bell locations due to contamination risks.

Nearly 7,000 cases nationwide are confirmed or under investigation, according to the CDC. Michigan has accounted for the bulk of cases so far.

Shredded iceberg lettuce supplied by Taylor Farms and sold at some Taco Bell restaurants has been linked to a multistate outbreak of cyclosporiasis, a source familiar with the…