President Joe Biden's doctor said Friday that Biden's Covid-19 symptoms have improved since he tested positive for the illness, and that Biden's voice is "deeper" than usual.

In this image provided by the White House, President Joe Biden speaks with Sen. Bob Casey, D-Pa., on the phone from the Treaty Room in the residence of the White House Thursday, July 21, 2022, in Washington.

The phone from the Treaty Room in the residence of the White House was used by President Joe Biden to speak with a senator.

Associated Press

According to a letter from Dr. Kevin O'Connor, Biden had a 99.4 degree temperature on Thursday evening, which went down and has remained at normal levels.

The president has a sore nose, fatigue, and sometimes a cough.

O'Connor said it's "reasonable" to add a "low dose aspirin as an alternative type of blood thinner"

There has been nothing in the course of Biden's illness to make the doctor think he won't respond favorably to treatment.

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The Covid-19 vaccine has been administered to Biden. The president took his meetings from the residence after experiencing mild symptoms. Biden thanked his followers for their well wishes and said he was doing well. The first lady said she did not test positive and would continue to wear a mask.

Biden tests positive for covid.