The appropriate group to review this topic is Senior Public Health Analysts specializing in Risk and Crisis Communication.
Abstract: Public Health Communication Gap During the 2025 Measles Outbreak
An exploratory analysis published in Vaccine suggests the Centers for Disease Control and Prevention (CDC) significantly curtailed its social media communication regarding measles during the large-scale U.S. outbreak in 2025, resulting in a "health communication void." Between January 1 and August 1, 2025, the CDC posted only 10 times about measles across Facebook, Instagram, and X, a dramatic reduction from the historical average of 46 posts during comparable periods. Crucially, none of the 2025 posts promoted the MMR vaccine, deviating from historical norms where 82% of measles-related communication encouraged immunization. This void was actively filled by major news media, which generated over 1,000 related posts, and, notably, by anti-science organizations such as Children’s Health Defense, which used the platform X to spread vaccine misinformation. The study underscores the risk associated with institutional silence in polarized information environments, suggesting it permits external entities to set the public health agenda.
Summary: CDC Social Media Activity During 2025 Measles Crisis
Outbreak Context: By October 2025, the U.S. had reported over 1,600 measles cases across 42 states, marking the highest annual case count since 2000, when measles was declared eliminated.
Reduced CDC Communication (0:00): An analysis examining CDC social media activity (Facebook, Instagram, X) from January 1 to August 1, 2025, found only 10 measles-related posts.
Historical Comparison (0:00): This 2025 output contrasts sharply with the average of nearly 46 measles-related posts the CDC generated during the same period in the previous four years (2021–2024).
Absence of Proactive Promotion (0:00): None of the 2025 CDC posts explicitly supported MMR vaccination, the primary preventative measure. Historically (2021–2024), 82% of their related posts encouraged immunization or catch-up vaccination.
Reactive and Unlinked Content (0:00): Most 2025 posts were text-heavy, clustered in late February/early March following a related death, and were primarily reactive statements or amplifications of comments from U.S. Health and Human Services Secretary Robert F. Kennedy Jr. Only half of the 2025 posts linked to authoritative CDC website guidance, compared to nearly all historical posts.
Filling the Information Void (0:00): As the CDC's voice receded, major news outlets generated over 1,000 measles-related social media posts, demonstrating the shift of agenda-setting power to the attention economy of journalism rather than public health messaging.
Rise of Anti-Science Voices (0:00): The CDC's silence created space for organizations like Children’s Health Defense (CHD), which, despite prior deplatforming, posted 101 times on X, focusing on the alleged dangers of the MMR vaccine and downplaying the outbreak severity.
Audience Disparity (0:00): The CDC maintains a substantial social media audience (12 million followers), dwarfing the combined reach of professional medical organizations (AAP, AMA, AAFP) which total approximately 2.5 million followers, though CHD holds about three times the followers of AAP on X.
Risk Assessment (0:00): Authors concluded that silence from trusted institutions in polarized environments risks granting agenda-setting power to political and science-skeptical voices, transforming a preventable disease issue into merely a headline subject. The authors recommend the CDC resume evidence-based, proactive immunization campaigns.