Department of Health Reports First Measles Case in South Dakota

The South Dakota Department of Health has confirmed the state’s first measles case of 2025. The case involves an adult resident of Meade County who developed the illness after international travel. The infected individual visited multiple public locations before being diagnosed, prompting a public health advisory for potential exposure.

Measles symptoms appear in two stages. In the first stage, the individual may have a runny nose, cough, and a slight fever. The eyes may become reddened and sensitive to light while the fever consistently rises each day. The second stage begins on the third to seventh day of symptoms and consists of a temperature of 103-105°F, and a red blotchy rash lasting for four to seven days. The rash usually begins on the face and then spreads down to the trunk and out to the arms and legs.

“Measles is a highly contagious viral disease and spreads through the air from an infected person,” said Dr. Joshua Clayton, state epidemiologist. “Individuals who lack immunity from vaccination or past infection are at high risk of measles infection if they have contact with an infected person.”

The measles vaccine offers the best protection against infection and avoids the risks that come with infection. The following people are considered immune to measles:

• Born before 1957;
• Received 1 dose of measles vaccine (MMR) for an adult;
• Received 2 doses of measles vaccine (MMR) for a child or an adult at higher risk of infection;
• Presence of measles antibodies shown by a lab test; and
• Previous measles infection shown by a lab test.

Measles vaccine (MMR) is typically given at 12-15 months of age. The second dose of MMR is given at 4-6 years of age. The vaccine is highly effective at preventing measles infection, and two MMR doses usually produce lifelong immunity. If you are planning to travel internationally with children, MMR vaccines can be given to children starting at six months of age.

Learn more about measles on the Department of Health website, where you can find fact sheets, frequently asked questions, and a webinar for healthcare providers.