Disease outbreaks

J&J Covid vaccine booster shot is 94% effective when given at two months

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NY activates quarantine for travelers from hotspots

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Reopened states see new cases climb; US Open to be held without fans

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Texas and Florida pause reopening more business as cases surge

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Europeans sign deal for 400 million vaccine doses

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Retailers show early signs of recovery; AstraZeneca ramps up antibody study

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