This area is commonly closer to the motor of the unit and the temperature is different from that in the body of the refrigerator.
We recommend that you remove the vegetable bins and put bottles of water in that space to help maintain a constant temperature in your refrigerator.
Storage in any boxes or bins can help maintain temperature longer, especially if power is lost.
Perforated bins may allow for better air circulation around the vaccine, thus helping to maintain correct temperature.
Combination refrigerator/freezer units are less capable of simultaneously maintaining proper storage temperatures in both compartments.
Generally speaking, CDC recommends avoiding the top shelf and the areas near vents due to temperature fluctuations.
Stand-alone units can vary in size from compact, under-the-counter (not dormitory) style to large, stand-alone, pharmaceutical grade units. Vaccines that are stored in the refrigerator portion of a combination refrigerator/freezer should be moved away from the vent located in the refrigerator compartment.
The cold air from the freezer is circulated into the refrigerator compartment to cool it, which can cause your vaccines to freeze.
(In most two-compartment units, cold air from the freezer is circulated for cooling the refrigerator.)The ideal situation would be to get a stand-alone pharmaceutical/purpose-built refrigerator unit for your vaccines, and use your refrigerator/freezer combination unit for your food and drinks.
Please refer to page 8 of the "Vaccine Storage and Handling Toolkit" available at https://gov/vaccines/hcp/admin/storage/toolkit/