Diseases, Conditions, Syndromes

China says Delta variant behind virus surge

China raced Saturday to contain its worst coronavirus outbreak in months, as health officials blamed the highly infectious Delta variant for a surge in infections spanning 14 provinces.

Diseases, Conditions, Syndromes

UK PM urges caution as virus cases fall for seven days

Prime Minister Boris Johnson called for caution Tuesday as Britain registered lower coronavirus case numbers for seven days in a row—a decline that has surprised officials and experts.

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