New polio vaccine approved and distributed in US

VS Oveta Culp Hobby, US Secretary of Health, Education, and Welfare signs approval for licensing, manufacturing, and distribution of Dr. Jonas Salk's polio vaccine; Surgeon General Dr. Leonard A. Scheele looks on; a view of her signature seen from behind / label on box "Polio Vaccine Rush"; pan left/tilt down to a box containing many small boxes of the vaccine; ZO as a man's hand reaches into the box, pulls out vaccine boxes, adds them to a stack on a table in fg (an ashtray with spent cigarettes at right) / VS same man packs a smaller box with vaccines, closes it in preparation for shipment / VS Salk immunizes a young boy; CU him, CU boy / MS Salk immunizes a young girl / side angle CU girl smiles // Washington, DC: VS a boy (probably a preteen) walks along street, using crutches; he stops and faces camera, with the Washington Monument in bg / CU the smiling boy / WS he turns, moves toward the Monument / Note: exact day not known