
HHS.gov @HHSGov
Dr. Daniel Hale Williams performed the world's first successful heart surgery. Visit the @NLM_NIH to learn about more African American trailblazers in medicine. https://t.co/oXmuZ8Ml6h. #HeartMonth #BlackHistoryMonth https://t.co/j0wEiqP4qY — PolitiTweet.org