Columbia County Public Health confirmed Wednesday that at least three residents have tested positive for measles. The cases are tied to a laboratory‑confirmed measles infection identified in another Wisconsin county, indicating the disease crossed county lines.

Unvaccinated Individuals Affected

According to the health department, every confirmed case to date involves a person who was not vaccinated against measles. The agency emphasized that vaccination remains the most effective protection against the highly contagious virus.

Exposure Details

Investigators have not identified any public locations where exposure occurred. So far, known exposures are limited to private gatherings, and no large‑scale events have been linked to the outbreak.

Symptoms and Guidance

Measles symptoms typically appear 7‑21 days after exposure and may include a runny nose, high fever, tiredness, cough, red watery eyes, and a red rash with raised bumps that begins at the hairline and spreads to the arms and legs three to five days after the initial symptoms.

The health department urges anyone who develops these symptoms to stay home, call their doctor’s office first, and follow medical advice before seeking in‑person care. This precaution helps protect other patients and health‑care staff.

Ongoing Investigation

Columbia County Public Health continues to investigate the source and extent of the outbreak. The department will provide updates as more information becomes available and will work with neighboring counties to contain further spread.

Residents are reminded that the measles vaccine is safe, effective, and widely available through local health clinics and pediatric offices. Getting vaccinated not only protects the individual but also safeguards families and the broader community.

Original reporting: NBC15 WMTV (Gray) – local — read the source article.