By Alex Leary

President Trump tested negative for Covid-19 on consecutive days, White House physician Sean Conley said in a memo released Monday afternoon as Mr. Trump traveled to Florida for his first formal campaign rally since being treated for the virus.

Dr. Conley said tests and other measurements "have informed our medical team's assessment that the president is not infectious to others."

The memo didn't specify when Mr. Trump was tested.

Mr. Trump was tested using Abbott Laboratories's BinaxNOW Covid-19 Ag Card, the memo said. The U.S. Food and Drug Administration has granted emergency-use authorization to Abbott Laboratories for a $5 rapid-response Covid-19 antigen test that is roughly the size of a credit card.

"It is important to note that this test was not used in isolation for the determination of the president's current negative status," the doctor's memo said, adding that other data were used. "This comprehensive data, in concert with the CDC's guidelines for removal of transmission-based precautions," informed the team's assessment, the memo said.

The White House has faced pressure to say more about Mr. Trump's testing, and it has declined to say when the president last tested negative before disclosing his positive result around 1 a.m. on Oct. 2, only days after his first debate with Democratic presidential nominee Joe Biden.

Write to Alex Leary at alex.leary@wsj.com

(END) Dow Jones Newswires

10-12-20 1822ET