US virus cases are rising again, doubling over three weeks


              FILE - In this Wednesday, July 7, 2021, file photo, patrons enjoy cold tropical cocktails in the tiny interior of the Tiki-Ti bar as it reopens on Sunset Boulevard in Los Angeles. COVID-19 cases have doubled over the past three weeks, driven by the fast-spreading delta variant, lagging vaccination rates in some states and Fourth of July gatherings.  Los Angeles County public health officials have urged people to resume wearing masks indoors regardless of their vaccination status. (AP Photo/Damian Dovarganes, File)
            
              FILE - In this Wednesday, July 7, 2021, file photo, patrons enjoy cold tropical cocktails in the tiny interior of the Tiki-Ti bar as it reopens on Sunset Boulevard in Los Angeles. COVID-19 cases have doubled over the past three weeks, driven by the fast-spreading delta variant, lagging vaccination rates in some states and Fourth of July gatherings.  Los Angeles County public health officials have urged people to resume wearing masks indoors regardless of their vaccination status. (AP Photo/Damian Dovarganes, File)
            
              FILE - In this Wednesday, July 7, 2021, file photo, patrons enjoy cold tropical cocktails in the tiny interior of the Tiki-Ti bar as it reopens on Sunset Boulevard in Los Angeles. COVID-19 cases have doubled over the past three weeks, driven by the fast-spreading delta variant, lagging vaccination rates in some states and Fourth of July gatherings.  Los Angeles County public health officials have urged people to resume wearing masks indoors regardless of their vaccination status. (AP Photo/Damian Dovarganes, File)
            
              FILE - In this Wednesday, July 7, 2021, file photo, patrons enjoy cold tropical cocktails in the tiny interior of the Tiki-Ti bar as it reopens on Sunset Boulevard in Los Angeles. COVID-19 cases have doubled over the past three weeks, driven by the fast-spreading delta variant, lagging vaccination rates in some states and Fourth of July gatherings.  Los Angeles County public health officials have urged people to resume wearing masks indoors regardless of their vaccination status. (AP Photo/Damian Dovarganes, File)
            
              FILE - In this Wednesday, July 7, 2021, file photo, patrons enjoy cold tropical cocktails in the tiny interior of the Tiki-Ti bar as it reopens on Sunset Boulevard in Los Angeles. COVID-19 cases have doubled over the past three weeks, driven by the fast-spreading delta variant, lagging vaccination rates in some states and Fourth of July gatherings.  Los Angeles County public health officials have urged people to resume wearing masks indoors regardless of their vaccination status. (AP Photo/Damian Dovarganes, File)
            
              FILE - In this Sunday, July 4, 2021, file photo, spectators watch as fireworks explode over the Las Vegas Strip during a 4th of July Fireworks show in Las Vegas. COVID-19 cases have doubled over the past three weeks, driven by the fast-spreading delta variant, lagging vaccination rates in some states and Fourth of July gatherings. The five states with the biggest two-week jump in cases per capita all had lower rates, Missouri, 45.9%; Arkansas, 43%, Nevada, 50.9%, Louisiana, 39.2% and Utah, 49.5%.    (AP Photo/John Locher, File)