Along with the 29 new cases, the health department said there are 354 people in quarantine until Feb. 24,\u00a0and 22 people in isolation. The report says that 233 of those sickened are under age 5, and 555\u00a0are between the ages of 5 and 17.<\/p>\n
\u201cDPH has also confirmed a case of measles<\/a> in a Sumter County resident. At this point in the investigation, it is not yet clear whether this new case is linked to the Upstate outbreak centered around Spartanburg County or if the case may have been exposed where measles is occurring in other locations,\u201d the statement said.<\/p>\n Getty<\/p>\n Sumter County is located several counties south of Spartanburg County, where the outbreak of the wildly infectious virus began in October. Since then, cases have steadily climbed, and in the second week of January, they doubled<\/a>. Last Friday, there were 847 <\/a>cases.<\/p>\n Those exposed to infected people have been quarantined, health officials say, including many from elementary schools. The most recent report from the South Carolina Department of Health cites Mariachis Mexican Restaurant, the grocery store Food Lion, and a Walmart as sources of exposure.<\/p>\n In South Carolina, 91.2% of kindergarteners are vaccinated, the U.S. Centers for Disease Control<\/a> data says; That\u2019s well below the threshold to meet herd immunity, which the agency explains helps stop the spread of the disease: \u201cWhen more than 95% of people in a community are vaccinated (coverage >95%), most people are protected through community immunity (herd immunity).\u201d<\/p>\n The agency\u2019s most recent data says that 94% of those infected with measles in 2026 were not vaccinated with the measles, mumps, and rubella (MMR) vaccine<\/a>, which the CDC says \u201cis very safe and effective.\u201d It\u2019s a two-shot series: The first dose is administered between 12 and 15 months of age and the second shot comes between 4 and 6 years.<\/p>\n Manjurul\/Getty<\/p>\n Never miss a story \u2014 sign up for\u00a0PEOPLE’s free daily newsletter<\/a>\u00a0to stay up-to-date on the best of what PEOPLE has to offer, from celebrity news to compelling human interest stories.<\/p>\n Some adults may not remember getting the shots \u2014 or if they were born before 1957, traditional guidelines considered them immune. Measles was so widespread before the vaccine’s introduction in 1963, medical professionals assume most people were exposed to it, resulting in some immunity.<\/p>\n The virus isn\u2019t \u201cjust a little rash,\u201d the CDC<\/a> says. Along with the telltale rash, measles can cause a high fever, cough, pneumonia, swelling of the brain (encephalitis), and death. The agency says one in five people with measles will be hospitalized, and one in 20 children will develop pneumonia, which it says is \u201cmost common cause of death from measles in young children.\u201d<\/p>\n![\"Stock](\"https:\/\/www.newsbeep.com\/ca\/wp-content\/uploads\/2026\/02\/ddd96ac0426e66c85cab8faa2446da7a.jpeg\"\/)
Stock image of a child with measles. <\/p>\n![\"Stock](\"https:\/\/www.newsbeep.com\/ca\/wp-content\/uploads\/2026\/02\/5fa3e61b691e09de62e35af9b4f5efd4.jpeg\"\/)
Stock image of the MMR vaccine. <\/p>\n