UPS is building vaccine freezer farms

UPS is building freezer farms to store vaccines, which can be useful when there is an available Covid-19 vaccine. FedEx has built 10 freezer facilities over the past three years, and DHL built a 20,000 sq ft freezer farm in Indianapolis. CNBC's Ylan Mui joins 'Closing Bell' to discuss.
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Fri, Sep 18 20204:46 PM EDT