Kremlev, who is considering standing for President of the International Boxing Association (AIBA) after he claimed last week that more than 50 countries had asked him to put himself forward, revealed news of his condition on his Instagram page.

"Dear friends, I want to inform you that my test for COVID-19 gave a positive result!" Kremlev wrote.

"Your health and follow all the prescriptions and recommendations of doctors!

"Be healthy!"

The RBF told insidethegames that Kremlev received the positive test for coronavirus today after initially visiting the hospital to have a shot of the vaccine launched in Russia.

But being diagnosed, he was admitted to hospital in Moscow for treatment and later developed a fever. 

The RBF described Kremlev's condition as "stable".

"Umar Kremlev came on Monday at the hospital to make a vaccine against COVID-19," a statement from the RBF sent to insidethegames said. 

"Before it, he made a test which appeared to be a positive one.

"He is in hospital at the moment with fever. 

"His conditions are stable. 

"In accordance with all the prescriptions, he will have to undergo treatment under the supervision of doctors."

Russia has been one of the countries most badly affected by coronavirus.

There have so far been 1.23 million recorded cases in Russia, with 21,475 deaths. 

It is unclear what effect suffering from COVID-19 will have on Kremlev's plan to stand for President of AIBA.

Last week, Kremlev told Russia's official state news agency TASS that "more than 50 countries are asking me to go to the elections".

He claimed, though, that he had not yet made a final decision on whether or not to stand. 

Kremlev, also the first vice-president of the European Union Boxing Confederation, has been a key figure at AIBA in recent times. 

Having taken on the role of Marketing Commission chair, Kremlev devised a series of AIBA Forums to create fruitful dialogue between the governing body, Confederations and National Federations.

These took place in the Americas, Oceania and Asia at the start of the year before being halted by the coronavirus pandemic. 

It was decided last week to hold the AIBA Ordinary Congress virtually on December 12 and 13 as a result of the global health crisis. 

AIBA members will elect a new President and vote for the new Constitution of the organisation.

So far, the only candidates to have declared publicly are Azerbaijan's Suleyman Mikayilov and the Dominican Republic's Domingo Solano.

The deadline for candidates to put themselves forward is November 2. 

AIBA has been without a permanent President for 18 months after Uzbekistan's Gafur Rakhimov stood down in March 2019 following allegations that he was involved in heroin trafficking. 

This controversy, alongside allegations of financial mismanagement at AIBA, led to the International Olympic Committee stripping the world governing body of its right to organise the boxing tournament at Tokyo 2020.