How Long Will A Covid Vaccine Be Effective And Why Cold Storage Is Important | NBC News NOW

AstraZeneca said its Covid-19 vaccine could be up to 90 percent effective in preventing the disease — a third breakthrough in the fight against the pandemic. Dr. John Torres explains why AstraZeneca’s vaccine not needing cold storage is important, and how long a vaccine will likely keep recipients protected against the virus.
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How Long Will A Covid Vaccine Be Effective And Why Cold Storage Is Important | NBC News NOW

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