That is the view of medical expert Ben Dinnery, who runs the Premier Injuries site and has a background in medicine and data analysis.
News broke that star man Kante tested positive for coronavirus on 28 September and he has since missed the 1-0 loss to Juventus and 3-1 win over Southampton.
The French midfielder, who tomorrow finishes his 10-day isolation period, will also miss tonight’s Nations League semi-final against Belgium.
Chelsea boss Thomas Tuchel told the club website on 2 October that Kante is “doing well” and in regular contact with club doctors.
He told Football Insider correspondent Adam Williams: “The problem is that there isn’t massive amounts of data in terms of how it affects players.
“This illness attacks the respiratory system. We have seen players who are asymptomatic, then we have seen other extremes.
“Allan Saint-Maximin and Jamaal Lascelles at Newcastle, as well as Przemyslaw Placheta at Norwich have suffered from long-Covid.
“That has resulted in the struggling for weeks if not months. Players can become highly fatigued and have shortness of breath.
“There are varying degrees of how people are affected and we don’t have any precedent to go off.
“Thankfully, Tuchel has come out and said that Kante is in a good way. The club doctors are in touch on a daily basis.
“So I would expect there to be a full medical evaluation before he resumes any activities soon.”