Jonas Salk, who lead the team that developed the first poliovirus vaccine, was born 100 years ago today, 28 October 1914, in New York City. Numerous sites across the country have convened symposia in his honor. Last week City College of New York, where Salk earned a bachelor’s degree, held a centennial celebration. The photo shows Salk’s son Peter speaking at the celebration. New York University Medical Center, where Salk obtained his MD degree, also had a celebration last week. The Salk Institute, founded by Jonas Salk, will hold a celebration on 13 November. And today’s Google Doodle is in honor of Dr. Salk.