The US President made the claims before addressing thousands of his fans in Florida without a mask yesterday.
He said: "I'll walk in there, I'll kiss everyone in that audience. I'll kiss the guys and the beautiful women... I'll just give ya a big fat kiss."
The rally at Sanford, Florida, was the first since the 74-year-old revealed he had tested positive for the virus on October 1.
State Governor Ron DeSantis also attended the rally and was spotted without a mask, offering up high fives to the crowd.
The Republican president boarded Air Force One hours after his doctors announced he had tested negative for coronavirus.
Press Secretary Kayleigh McEnany shared a memo from Trump's physician just after AF1 took off which said Trump had tested negative on consecutive days.
The memo stated the result was derived from a series of lab tests and other data that indicated a "lack of detectable viral replication."
It ends by saying the results have, "informed our medical team's assessment that the President is not infectious to others" but does not say when Trump tested negative.
Meanwhile, a new case study published in The Lancet revealed the first confirmed case of reinfection in the US.
A 25-year-old man in Nevada was infected with coronavirus twice six weeks apart this year.
There have only five been re-infection cases documented worldwide, with scientists still working to find out why it happens.
The Centers for Disease Control and Prevention currently advises that those who have recovered from Covid-19 generally appear to be protected from reinfection for three months.