Jenna Ellis, 36, tested positive several days after a Dec. 4 Christmas party at the White House, Giuliani told WABC Radio.
The Trump campaign, which hasn’t publicly acknowledged the diagnosis, didn’t respond to a request for comment.
Giuliani was speaking from a hospital where he was being treated after testing positive for COVID-19 on Dec. 6.
While a small percentage of patients die from COVID-19, most people survive, many without showing symptoms or with few symptoms. Those most at risk are the elderly or those with compromised immune systems.
Ellis tested negative for the disease the day after the party, Giuliani said. “It could be a freak that she had it, but I can’t imagine she had it at that time,” he said. “She didn’t necessarily have it at the party.”
“If you are invited to a place, and they test you, and they test you as negative, you go in.”
Ellis and Giuliani have been traveling to battleground states to present evidence of election irregularities to lawmakers in hopes of convincing them to take back the power to select electors and ultimately choose electors for Trump. Democratic presidential nominee Joe Biden is ahead in the states, according to vote certifications from state election officials.
Giuliani, 76, said he was tested on Nov. 30 and Dec. 1 and tested negative both times. He then traveled to Arizona, Michigan, and Georgia.
He began showing symptoms on Dec. 5 and had a positive test the following day.
“On Saturday, I was a little more tired than normal. And I just attributed that to being tired,” Giuliani said. He was discharged from the hospital on Dec. 9.
It wasn’t clear whether Ellis was in a hospital. She posted on Twitter throughout Dec. 8, including a post that may have alluded to reports of her diagnosis that cited anonymous sources.
She said mainstream media “is quick to believe one or two unnamed ‘sources’ every time, and yet refuses to acknowledge hundreds of eye witnesses across six states who signed affidavits under oath.”