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Some coronavirus patients who are listed as “recovered” are still experiencing worrying symptoms which suggest that there may be long-term effects, they have warned.

Of over two million confirmed coronavirus cases worldwide, just over 560,000 have so far been listed as recovered.

US Broadway star Danny Burstein has trained for his whole life as a singer and dancer – his discipline has built extraordinary stamina and lung-power.

But now, a few weeks doctors told him he had recovered from coronavirus, just walking down a couple of flights of stairs leaves him winded.

“Sometimes I’m having conversations and I can’t get enough air, that’s the toughest part,” he told the New York Post.

“It’s frustrating. It’s been a very slow recovery. For the most part, the symptoms are gone, but what remains is the damage that was done to my lungs.”

(Image: NY Post)

Even the earliest Covid-19 cases are only few months old. There’s still a lot that doctors don’t know about the long-term effects of the disease.

Danny, 55, says that there have been plenty of “false dawns” in his battle with Covid-19.

He said: “It would be as if it was going away, and then you’d have these weird flare-ups.

“One day it’s crazy sweats and headache and then it’s backache, when one goes away, one comes back. It’s like fingernails sliding down your back, clinging on.”

He said that has been advised by his doctor to blow up a balloon “every hour” to strengthen his lungs.

(Image: Patrick McMullan via Getty Images)

He’s not the only one.

Many other coronavirus victims, such as US actress Brianna Cohen, 32, and Shaun Khubchandani, 30, have reported that their lungs feel like they’re “on fire” long after they were declared recovered.

Lung specialist Mina Rafik Makaryus said: “One of the biggest questions . . . is [whether] these patients will recover fully, or if there will be chronic lung damage from this virus.”

As yet, no-one knows whether the patients that doctors have signed off as “recovered” will suffer any long-term complication or whether they are just going through a long, slow process of recuperation.

All that is known for certain is that this virus has done lasting damage which will take years to fully assess.