This letter from the Chief Medical Officer of Health addresses the maintenance of cold chain equipment by the agency in the Jalpaiguri/Uttar Dinajpur Dakshin Dinagpur district. It notes that as per the assessment report on EVM in West Bengal from October 2021, the sickness rate in any district should not exceed 20%. It requests information on what action has been taken by the district to keep the sickness rate within 20% and treats this issue as a top priority.