Vaccine vial monitors (VVMs) are small stickers that adhere to vaccine vials and change color as the vaccine is exposed to heat, letting health workers know whether the vaccine can be safely used for immunization. This fact sheet answers the most frequently asked questions regarding VVMs.
Corporate author(s): PATH, World Health Organization
Publication date: January 2011
275 KB PDF
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Related regions: Global
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Contact: PATH Publications
Mailing address: PATH, PO Box 900922, Seattle, WA 98109 USA