Core Viewpoint - The World Health Organization (WHO) has revoked the measles "elimination status" for the UK and several other countries due to ongoing outbreaks of the disease, highlighting a significant decline in vaccination coverage over the past decade [1][2]. Group 1: WHO Certification Status - The WHO confirmed the cancellation of measles "elimination status" for the UK, Spain, Austria, Armenia, Azerbaijan, and Uzbekistan due to the re-emergence of local transmission of the disease [1]. - A country must have no local transmission of the same strain for over 12 months to be recognized as measles-free by the WHO [1]. Group 2: Vaccination Data - In 2024, the UK reported 3,681 cases of measles, with only approximately 84.4% of the population vaccinated with two doses of the measles and rubella vaccine [1]. - The WHO recommends that at least 95% of the population should be vaccinated with two doses to effectively control measles outbreaks [1]. Group 3: Expert Commentary - Ben Castan-Dabush, an assistant professor at the London School of Hygiene and Tropical Medicine, indicated that the loss of the WHO's measles "elimination status" for the UK was not surprising, as vaccination coverage has been declining for a decade [1].