The three states are among a handful of battleground states where collectively more than a million votes have yet to be counted, as of 10 a.m ET on Thursday.

Arizona, Nevada and Pennsylvania have each witnessed an increase in their average daily case tally over the latest 14-day period from October 22 to November 4, according to JHU.

At the time of writing, at least 86 percent of expected votes have been counted in Arizona, Nevada and Pennsylvania, according to data compiled by Reuters.

Just a day after the election, the U.S. reported a record high of more than 100,000 new infections—the highest single-day rise since the pandemic began, according to JHU.

Here we take a closer look at the outbreak in Arizona, Nevada and Pennsylvania. Daily case tallies below reflect a seven-day moving average of daily new infections reported from October 22 to November 4.

Pennsylvania

Day 1 (October 22): 1,708. 43Day 14 (November 4): 2,523Highest daily case count in 14-day period: 2,523 on November 4Lowest daily case count in 14-day period: 1,708. 43 on October 22

The seven-day moving average of daily new cases in Pennsylvania, a potential tipping point state, has been increasing since late September. The figure declined from early April and increased from mid-June to late July before flattening out through late September, according to JHU.

Total confirmed cases in the state are approaching nearly 223,000, with 8,878 reported deaths, as of Thursday, according to JHU.

Arizona

Day 1 (October 22): 1,002Day 14 (November 4): 1,171. 75Highest daily case count in 14-day period: 1,385. 14 on October 31Lowest daily case count in 14-day period: 1,002 on October 22

The seven-day moving average number of daily new infections in Arizona has been rising since late September. However, the figure has not reached the peak level recorded on July 3, when it hit 3,844. The average count declined sharply from early July and flattened out from late August to late September, according to JHU.

The total number of confirmed infections in Arizona have surpassed 250,600, with 6,059 reported fatalities, as of Thursday, according to JHU.

Nevada

Day 1 (October 22): 777. 43Day 14 (November 4): 833Highest daily case count in 14-day period: 944. 86 on November 1Lowest daily case count in 14-day period: 777. 43 on October 22

The seven-day moving average number of daily new infections in Nevada has been rising on a steep incline since early September, after dropping sharply from mid-July, when it peaked at 1,171 (on July 17). The figure remained flat from late March to late May, before rising sharply through mid-July, according to JHU.

The total case tally to date in Nevada has climbed past 104,000, with 1,814 reported deaths, as of Thursday, according to JHU.

The wider picture

The novel coronavirus has infected more than 48.2 million people across the globe since it was first reported in Wuhan, China, including more than 9.4 million in the U.S.

Globally, more than 1.2 million have died following infection, while more than 31.9 million have reportedly recovered as of Thursday, according to JHU.

The graphic below, produced by Statista, illustrates the spread of COVID-19 cases in the U.S.