Coronavirus updates: 84% of California population to go on lockdown Sunday night

There were 138,903 new cases of COVID-19 confirmed in the United States on Sunday, according to a real-time count kept by Johns Hopkins University.

It's the 27th straight day that the country has reported over 100,000 newly diagnosed infections. Sunday's count is down from a peak of 205,557 new cases on Friday.

An additional 826 fatalities from COVID-19 were also registered nationwide on Sunday, less than the all-time high of 2,609 new deaths on April 15.

COVID-19 data may be skewed in the coming days and weeks due to possible lags in reporting over Thanksgiving followed by a potentially very large backlog from the holiday.

A total of 13,384,651 people in the United States have been diagnosed with COVID-19 since the pandemic began, and at least 266,875 of them have died, according to Johns Hopkins. The cases include people from all 50 U.S. states, Washington, D.C. and other U.S. territories as well as repatriated citizens.

Much of the country was under lockdown by the end of March as the first wave of pandemic hit. By May 20, all U.S. states had begun lifting stay-at-home orders and other restrictions put in place to curb the spread of the novel coronavirus. The day-to-day increase in the country's cases then hovered around 20,000 for a couple of weeks before shooting back up over the summer.

The numbers lingered around 40,000 to 50,000 from mid-August through early October before surging again to record levels, crossing 100,000 for the first time on Nov. 4 and reaching 200,000 for the first time on Nov. 27.

Hospitalizations of COVID-19 patients in the United States reached an all-time high of 93,238 on Sunday, according to the COVID Tracking Project.

The figure surpassed Saturday's record of 91,635 COVID-19 patients currently hospitalized. Current COVID-19 hospitalizations have gone up every day since Oct. 25, except for Sunday when the figure dipped slightly to 89,834, which The COVID Tracking Project credited to "the holiday effect."

The COVID Tracking Project, a volunteer-run effort launched from The Atlantic magazine to track the U.S. outbreak, has warned of data inconsistencies in the coming days and weeks due to lags over Thanksgiving followed by a potentially very large backlog from the holiday. For instance, some states didn't report any data at all on Friday, the day after Thanksgiving, while others only had partial reports. The totals for testing and new cases were inflated Saturday and Sunday as several states reported two days' worth of data.

"The data wobbles don't consist only of some states not reporting at all -- though that's happened a lot -- but that most or all states that are reporting do not have a full data pipeline from labs and health departments," The COVID Tracking Project wrote on its Twitter account Sunday.

However, the group noted that hospitalization numbers "are less affected by the data slowdown."