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What does Pfizer's vaccine mean for Asia? Five things to know

Questions remain over new technology, long-term immunity and limited supply

TOKYO -- U.S. drugmaker Pfizer lifted spirits worldwide this week with word that its vaccine candidate was found to be "more than 90% effective in preventing COVID-19."

Scientists think it could lead to a victory against the coronavirus, but warn against premature optimism and want more information before drawing conclusions. Here are five things to know.

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