https://apnews.com/561a40f49436471f915e1a53e1424ffe

PITTSBURGH (AP) — Peter Salk still remembers the trepidation he felt when his father came home from work one day in May 1953 and promptly began boiling a set of needles and syringes on the kitchen stove.

With several years of research and promising results in monkeys fueling high hopes, Dr. Jonas Salk had brought from his lab at the University of Pittsburgh a still-experimental vaccine candidate to their Pine home. His family would become among the first humans in the world to test a shot against the mysterious polio virus crippling and killing children.