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HHS.gov @HHSGov
Dr. Daniel Hale Williams performed the world's first successful heart surgery. Visit the @NLM_NIH website to learn about more African American trailblazers in medicine. https://t.co/TlnxI2jWVG. #HeartMonth #BlackHistoryMonth https://t.co/UKWzsCUvDN — PolitiTweet.org