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This content was originally published by MarketWatch.com - Top Stories. Original publishers retain all rights. It appears here for a limited time before automated archiving. By MarketWatch.com - Top Stories
The COVID-19 vaccine candidates being developed by Moderna Inc. and BioNTech and Pfizer Inc. will require stringent standards for refrigeration, and that may hamper how they are distributed to the hundreds of millions of Americans expecting to receive them.