MADISON, Wis. — Four additional confirmed measles cases have been reported in southwest Wisconsin, bringing the regional outbreak total to 155 confirmed cases and six probable cases as of Friday. Lafayette County has recorded 73 confirmed cases and six probable cases. Iowa County has 62 confirmed cases, while Grant County has 20 confirmed cases. Residents are being urged to check whether they are protected against measles. Wisconsin residents can review their vaccination records through the Wisconsin Immunization Registry or contact a health care provider about their status and access to vaccines. People who are not vaccinated are encouraged to make a plan to receive the measles, mumps and rubella, or MMR, vaccine. The vaccine is available through medical offices and clinics, local health departments and some pharmacies. Programs may help residents who lack health insurance or whose coverage does not include vaccines. The state offers Vaccines for Children and Vaccines for Adults programs for eligible residents. The Wisconsin Department of Health Services recommends that children receive two MMR doses by age 4. People born before 1957 are generally considered immune to measles, according to the department. Measles is highly contagious, making vaccination and timely public-health guidance central to limiting transmission during an outbreak. Residents seeking more information about vaccine eligibility and measles prevention can consult the Wisconsin DHS measles information page.