# Behind the data: How NBC News tracked the decline in childhood vaccinations > HelixNews · Web page: https://helixnews.one/story/252232 · All pages for agents: https://helixnews.one/llms.txt 1 outlet covering · First listed: NBC News, Nov 10, 2026, 4:00 PM · Read it: How an NBC News data investigation tracked vaccination and school exemption rates across thousands of counties in the U.S. ## Who's covering it In the order they published: - Nov 10, 2026, 4:00 PM: [Behind the data: How NBC News tracked the decline in childhood vaccinations]() — NBC News (TV network, United States) How an NBC News data investigation tracked vaccination and school exemption rates across thousands of counties in the U.S.