AstraZeneca's COVID-19 shot will come too late for the US

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AstraZeneca's coronavirus vaccine faces a murky future in the US, where three other shots are already in use.
Public-health experts said the two-dose vaccine should secure an emergency OK from US regulators.
Despite that OK, the US may end up giving its AstraZeneca supply to other countries, they said.
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Dr. Ashish Jha, a top US public-health expert, earlier this month laid out what he thought was an unpopular opinion.Shortly after AstraZeneca ann