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technet21 postspacerIncreasing the Acceptable Temperature Range for Certain Vaccines

technet21 postspacerPolio Monthly Situation Report—October 2009

technet21 postspacerMNT Elimination Update for the Third Quarter of 2009
Issue 30, 23 November 2009
 
Editorial Note

Mogens Munck and Søren Spanner discuss alternative ways of keeping vaccines at the health centre level. Sainjargal Altanzul updates us on the world-wide polio situation. Also included is the latest report on the Maternal and Neo-natal Tetanus Elimination activities.


by Mogens Munck and Søren Spanner

The current practice of keeping vaccines at the health centre level in the temperature range of +2° to +8° C creates the following problems:

The current practice is rigid/inflexible: Vaccines are being kept colder than they need to be (as evidenced in Tables 9 and 10, pp. 45-46 in the WHO publication: “Thermo Sensitivity of Vaccines” on vaccine stability, which can easily be downloaded from the WHO website). According to these Tables our current EPI vaccines can be kept at +20° to +25° C at the health centre level for up to one month.

Inadvertent freezing: The current strict temperature range of +2° to +8° C leads to a high risk of inadvertent freezing.  For further evidence please see: http://www.path.org/vaccineresources/details.php?i=197.

Equipment/Space requirements: The existing cold chain does not have sufficient capacity to handle all the vaccines that are to be kept cold. Work done by WHO (Technical Officer S. Kone) indicates that the space requirements for storing the vaccines needed to fully immunize one child will increase dramatically—as much as 15 times more as new vaccines are introduced into countries.

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by Sainjargal Altanzul

The Report of the Independent Evaluation of the Major Barriers to Interrupting Poliovirus Transmission has been released, stating that if the managerial, security and technical issues have been identified and can be addressed, “polio eradication can be achieved”. Composed of 28 experts in public health, immunization, vaccinology, programme communications and security, the evaluation teams have identified cross-cutting and country-specific barriers and recommended strategies to address each of these in order to reach eradication as quickly as possible.

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During the third quarter of 2009, Tetanus Toxoid-Supplemental Activities (TT-SIAs) were conducted in 344 high risk districts (HRDs) of 8 countries, targeting more than 7.65 million women of reproductive age (WRA) with one or more doses of TT vaccine.

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Image taken from Bruce Weniger's ppt presentation
at TLAC meeting

 

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