Coronavirus updates: Herd immunity by fall 'ambitious,' says surgeon general nominee

Rochelle Walensky, the new director of the Centers for Disease Control and Prevention who began her role after U.S. President Joe Biden's inauguration Wednesday, released a statement saying she is extending the eviction ban due to the ongoing COVID-19 pandemic.

"As a protective public health measure, I will extend the current order temporarily halting residential evictions until at least March 31, 2021," she said in the statement. "The COVID-19 pandemic has presented a historic threat to our nation’s health. It has also triggered a housing affordability crisis that disproportionately affects some communities."

She said that as cases continue to rise, it's important to "keep people in their homes and out of congregate settings — like shelters — where COVID-19 can take an even stronger foothold."

An additional 450 deaths from COVID-19 were reported in Texas on Wednesday, marking a new record for the Lone Star State, according to data from the Texas Department of Health.

There were also 25,512 newly confirmed cases of COVID-19 and 5,017 probable cases reported Wednesday.

The cumulative totals now stand at more than 2.1 million confirmed and probable cases, including at least 32,844 deaths, according to the state health department data.

Dr. Rochelle Walensky, the new director of the U.S. Centers for Disease Control and Prevention, called for optimism and adherence to science in her first message to the American people on Wednesday.

"Better, healthier days lie ahead. But to get there, COVID-19 testing, surveillance, and vaccination must accelerate rapidly," Walensky said in a statement. "We must also confront the longstanding public health challenges of social and racial injustice and inequity that have demanded action for far too long."

Dr. Anne Schuchat, the CDC's principal deputy director, will be conducting a comprehensive review of the agency's existing COVID-19 guidance and will update those recommendations based on the best available scientific evidence, so that Americans can make informed decisions about their lives, Walensky added.

ABC News' Anne Flaherty contributed to this report.

The U.S. has experienced "a second week of encouraging data trends and projections" which "lends greater confidence that the country may, as a whole, be rounding a corner," according to researchers with PolicyLab at the Children's Hospital of Philadelphia.

In its weekly report based on an analysis of COVID-19 data, PolicyLab said much of the country appears "to be in a transition period during a winter surge."

Current positivity rates are down nationally and "projections from Southern California to Arizona suggest while overall case incidence may continue over the next four weeks, these areas might expect declines in overall transmission rates in many counties," the report stated.

Researchers noted caution "not to overstate ... optimism," citing evidence for possible increased transmission in winter vacation destinations such as Vail, Colorado, as well as Park City, Utah, and Sun Valley, Idaho.

Despite some positive outlook, the report said incidence in coastal areas of the Southeast may continue to worsen into February as people attempt to escape the winter weather.

Variants of the coronavirus could also be a factor in the "potential to increase case incidence again," the report stated.

ABC News' Brian Hartman contributed to this report