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Facts over fear: How long will a Covid vaccine be effective and why cold storage is important
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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.Nov. 23, 2020
