England recorded its highest ever COVID-19 infection prevalence in March and cases were still increasing in the over-55s at the end of the month, an Imperial College London survey said on Wednesday.

China has intensified COVID-19 restrictions in Xi'an and rolled out a fifth round of mass testing, as the city announces record high daily infections since the start of the pandemic.

Covid-19 infections are rising in the United States again, and could soon hit a weekly average of 100,000 cases a day, a report says.

Japan temporarily suspends the use of an additional one million doses of American Moderna coronavirus vaccine over deadly contamination reports.

Some 25% of SARS-CoV-2 infections among Los Angeles County residents occurred in fully vaccinated residents from May through July 25, a period that includes the impact of the highly transmissible Delta variant, US officials reported on Tuesday.

Vietnam deploys troops to its largest city to help the police enforce a strict coronavirus lockdown, following a sharp rise in the number of COVID infections.

Chinese health officials say they are bringing the country's worst COVID outbreak in months-- the highly contagious COVID-19 Delta variant-- under control.