The story of a time and temperature indicator that has dramatically changed the course of vaccine
management practices as well as shaped the future of the cold chain.


If we need to put a name against the discovery of VVM, who would that be? It is difficult to point to one single person since there were more than one midwife involved in the birth of VVM, although the initial thinking behind the use of chemical indicators for the temperature monitoring of vaccine vials belongs to John Allegra and Ray Baughman. The development of the concept of VVM goes way back to the 1970s when in two different locations and completely independently the idea was conceived.

Let’s salute all these heroes who played a part in bringing VVM technology into the world, some imagining it, some developing it and others making it all happen.