Scientists have warned that July 4 celebrations across the US risk accelerating the spread of the Delta variant of Covid-19, particularly in parts of the country where vaccination rates have lagged.
The US is preparing for a celebratory Independence Day weekend replete with parades, concerts and firework displays, in contrast to last year, when many large events were cancelled because of concern over the virus.
Despite progress in fighting the pandemic, experts say mass domestic travel and large gatherings may increase the spread of the Delta variant, especially among unvaccinated people, raising the prospect of localised surges in cases and hospitalisations.
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