The number of COVID-19 vaccine doses delivered across the United States over the past week dropped 22.5%, but the amount of doses administered increased 13.5%, according to a report from the U.S. Department of Health and Human Services.

The country has also seen a three-week downward trend in new COVID-19 cases, resulting in a 44% decline in the seven-day daily average since the peak on Jan. 8, the report said.

Still, the current number of daily cases remains over twice as high as the numbers during prior peaks.

ABC News’ Brian Hartman and Josh Margolin contributed to this report.

There are currently 91,000 people hospitalized with COVID-19 in the United States -- the lowest since Nov. 28, which was two days after Thanksgiving, according to an ABC News analysis of data compiled by The COVID Tracking Project, a volunteer-run effort to track the U.S. outbreak.

COVID-19 hospitalizations have declined across the country by nearly 30% over the last three weeks.

In the span of three weeks, the national seven-day average of daily COVID-19 cases has declined by 45.6% -- the steepest and most consistent non-holiday-related drop in cases the U.S. has seen since the summer.

ABC News’ Arielle Mitropoulos contributed to this report.

The director of the Africa Centers for Disease Control and Prevention said Thursday that the COVID-19 fatality rate on the 54-nation continent "is becoming very troubling," as it climbs higher than the global average.

John Nkengasong told reporters during a press conference that the death rate from COVID-19 in Africa, the world's second-largest and second-most populous continent, is now 2.6% while the global rate is 2.2%.

Nkengasong said 20 African nations, including South Africa and Sudan, have COVID-19 fatality rates higher than the global average as the continent grapples with new, more contagious variants of the virus. More than 3.5 million people across Africa have been diagnosed with COVID-19 since the start of the pandemic and nearly 89,000 of them have died, according to the latest data from the Africa Centers for Disease Control and Prevention.

The African Union regional bloc has secured 670 million doses of COVID-19 vaccines from various manufacturers. In addition, Africa is expecting around 600 million doses from the vaccine-sharing facility COVAX, which aims to start shipping nearly 90 million doses to the continent in February.

Enough COVID-19 vaccine doses have been secured to inoculate all U.S. Capitol Police personnel, according to Acting Chief Yogananda Pittman, who credited "efforts of the Congressional Leadership, especially House Speaker Nancy Pelosi and the Administration."

The federal police force has been hit hard by COVID-19 infections since the Jan. 6 siege at the U.S. Capitol in Washington, D.C..

"The Department expects delivery of the vaccines to occur shortly, and is already working with the Office of Attending Physician on logistics to administer them to our employees as quickly and safely as possible," Pittman said in a statement Thursday.

ABC News’ Jack Date contributed to this report.

The European Union's law enforcement agency, Europol, is warning member nations to be on the lookout for fake COVID-19 test certificates.

An increasing number of countries in the EU and beyond are requiring travelers to present proof of a negative COVID-19 test to be allowed entry when coming from a high-risk area. In an early warning notification issued Monday, Europol said several cases have emerged of fraudulent test certificates being sold to travelers, including the arrest of a forgery ring selling negative test results to passengers at France's Paris Charles de Gaulle Airport. The amount charged for the fake documents ranged between 150 to 300 euros ($181-362).

Fraudsters were also caught in the United Kingdom selling bogus test documents for 100 pounds ($137), faking the name of a genuine laboratory on the false certificates, according to Europol.

"The detection of fake COVID-19 negative test certificates confirms that criminals -- be it organised crime groups or individual opportunistic scammers -- seize profitable opportunities once they arise," the agency said in the notification. "As long as travel restrictions remain in place due to the COVID-19 situation, it is highly likely that production and sales of fake test certificates will prevail. Given the widespread technological means available, in the form of high-quality printers and different software, fraudsters are able to produce high-quality counterfeit, forged or fake documents."