The Johnson & Johnson COVID-19 vaccine has several advantages that will allow it to be applied across many low and middle-income countries. It is a single dose and remains stable for months with normal refrigeration. However if electricity for refrigeration is not available or if power fails all of the vaccine will be lost. Which salt would you use to design a backup refrigeration system that can be used to cool down the vaccines in case of power outages? Use evidence from the experiment to support your answer.
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John's Valli ko MP ke liye kuch plan
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