(Kim Ki Sam/Stars and Stripes)

Seoul, South Korea, November 1958: A lab technician examines samples of the encephalitis vaccine under a microscope at the National Vaccine Laboratory. Before a single dose of serum could be sent to doctors, it was checked for both purity and quality by the assay section of the laboratory.

August is National Immunization Awareness Month so check with your physician to make sure you're up to date on all your shots.

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