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  As virus cases rise across the U.S., records topple.

• Schools are staying open in Europe’s new lockdowns, a reversal from the spring.

• The U.S. should strengthen the W.H.O., not quit it, experts argue

• Outbreaks in swing states could have election consequences.

• An unproven Covid-19 drug is turning out to be a proven moneymaker for its manufacturer.

• Clemson’s star quarterback tests positive for the virus.