1995 Death Jonas Salk, biologist (Polio vaccine), dies of heart failure 1955 Event Salk polio vaccine safe and effective; 4 billion dimes marched 1955 Event Dr. Jonas Salk successfully tests Polio vaccine 1954 Event Nationwide test of Salk anti-polio vaccine begins 1954 Event 1st mass inoculation with Salk vaccine (Pittsburgh) 1953 Event Dr. Jonas Salk announces vaccine to prevent polio 1914 Birthday Jonas Salk, born in New York City, medical reseacher, polio vaccine
