Cases of coronavirus are surging in 21 different US states – almost half of the country – according to broadcaster CNN, which analysed data from Johns Hopkins University.
The number of cases in these states increased by at least 10% in the last week, compared to the week before.
Those states are: Alabama, Alaska, Colorado, Idaho, Maine, Michigan, Minnesota, Montana, Nevada, New Jersey, New Mexico, North Carolina, North Dakota, Oregon, South Carolina, South Dakota, Texas, Utah, Washington state, Wisconsin and Wyoming.
The figures are sparking fears of a new wave in autumn and winter as temperatures fall.
The US has reported more than seven million confirmed cases of the virus so far, and more than 200,000 deaths.