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