U.S. Department of Health & Human Services
Ampoules are sealed by a special machine which melts the top of the glass tubes to close it. The technicians wear a surgical gown, mask and have to ensure tha they do not contaminate the sera
Farkas, Tibor, photographer
World Health Organization
A technician, wearing a surgical mask, cap, and gown, is inserting ampoules into a machine to seal them. Verso: WHO/13095. General - Blood Transfusion.
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World Health Organization; Source: Record; Research date: 20151222
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