Biden has tested negative for COVID-19, according to a new statement Thursday evening, following their announcement earlier in the day that Biden had tested negative Wednesday night.

"Vice President Biden underwent PCR testing for COVID-19 today and COVID-19 was not detected," the campaign said in the Thursday evening statement.

This test comes after the campaign announced an aviation staffer who flew with Biden Monday and Tuesday of this week, but had no passing or close contact to Biden, tested positive for COVID-19.

With President Donald Trump and former Vice President Joe Biden holding separate town halls on the same night, “The View” co-hosts discuss which candidate will benefit most.

The Biden campaign announced that a person working with the aviation company that charters former Vice President Joe Biden's plane tested positive for COVID-19 Thursday.  While that person flew with Biden on Monday and Tuesday, the campaign said they were not in close contact with the former vice president or his campaign staff.

"The Vice President did not even have passing contact: this individual was over 50 feet from VP Biden at all times, entered and exited the aircraft from a rear entrance, and both the individual and the Vice President wore masks for the entire flight," Biden campaign manager Jen O'Malley Dillon said in a statement.

The aviation company employee's diagnosis was discovered as a result of the campaign's contact tracing following the positive diagnosis of Sen. Kamala Harris' communication's director Liz Allen and a non-staff flight crew member.

Although Harris tested negative for COVID-19, she canceled her in-person campaigning through Monday.

Because of Biden's lack of contact with the person who tested positive for COVID-19, his campaign said it would not be taking any additional precautions. Biden will still participate in an ABC News town hall Thursday night.

The Biden campaign announced earlier Thursday that Biden underwent a PCR test for COVID-19 Wednesday night and that test came back negative.

ABC News' Molly Nagle

The Biden campaign announced earlier in the day that the former vice president tested negative for COVID-19 Wednesday night -- the eighth publicly announced Biden coronavirus test result.

"As part of our regular routine of testing, Vice President Biden underwent PCR testing for COVID-19 last night and COVID-19 was not detected," the campaign said in a statement.  

It came on the heels of another announcement that a top aide to Sen. Kamala Harris, D-Calif., Biden's running mate, tested positive for COVID-19, prompting Harris to suspend travel "out of an abundance of caution" through Monday.

Harris and her husband, Doug Emhoff, both tested negative for COVID-19 Thursday, the campaign said.

-ABC News' Molly Nagle and Averi Harper

BIDEN'S CLAIM: Biden claimed that neither he nor the doctors he has spoken with had not seen a plan from the administration to distribute a COVID-19 vaccine. "There should be a plan," he said. "When we have the vaccine, how do we distribute it?"

FACT CHECK: The Trump administration does have a plan to distribute a potential COVID-19 vaccine, although the president has misrepresented how quickly it could be distributed.

Some of that plan was outlined in a Sept. 16 "Distribution Strategy," released jointly by the U.S. Department of Health and Human Services and Department of Defense.

The documents, according to HHS, provide an overview of distribution plans along with guidelines for "state, tribal, territorial, and local public health programs and their partners on how to plan and operationalize a vaccination response to COVID-19" in their communities.

The Trump administration also created "Operation Warp Speed," a partnership between HHS and DOD, as well as other private and federal agencies, to accelerate the research, development and eventual distribution of COVID-19 vaccines and treatments.

HHS Secretary Alex Azar has said that as part of Operation Warp Speed, federal officials have been laying the groundwork for vaccine delivery. "This in-depth, round-the-clock planning work with our state and local partners and trusted community organizations, especially through CDC, will ensure that Americans can receive a safe and effective vaccine in record time," Azar said in a press release last month.

Meanwhile, the Centers for Disease Control and Prevention executed a contract with McKesson -- the company that distributes the annual flu vaccine -- to distribute the COVID-19 vaccine when it becomes available.

Trump, though, has exaggerated how quickly most Americans could receive it, suggesting it would be widely available by the end of the year or even sooner. Federal public health officials and outside experts say most Americans will not be able to get vaccinated until well into next year.

-ABC News' Arielle Mitropoulos and Sony Salzman