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.

Author(s): PATH, World Health Organization

Published: 2011

Resource types: PATH resource; Fact sheet

Diseases: Not disease/vaccine specific

Topics: Cold chain logistics and technologies; Presentation and packaging

Regions: Global