USA When Ben Luderer, 30, began to feel tired, he was not surprised. His wife, Brandy, tested positive for nCoV a few days ago but wasn't too heavy.

Her body temperature rose very slightly, to the point that doctors didn't consider it a fever. Brandy has congested but has recovered. Witnessing his wife's condition, Luderer was not too worried even though he felt unwell. After all, they are young and healthy.

Both work at Cliffside Park in New Jersey. As a high school baseball star, Luderer continues to cultivate his passion by coaching a school baseball team.

However, unlike his wife, Luderer's symptoms quickly became serious. He had difficulty breathing and decided to go to the emergency hospital on March 27. "He was really worried," Brandy recalled. "He walked into the bedroom where I was lying and said 'You have to go, you have to go to the hospital".

"Are you sure?" Brandy asked. "That's right. You need to go," Luderer answered. Immediately, Brandy drove her husband to the hospital. She couldn't go inside with him because the hospital didn't allow it. So she sat in the car waiting all night. They text back and forth to update information.

At the hospital, Luderer was given oxygen and reacted well, Brandy said. They gave him fluids and Tylenol and let him go home that very night. "Do what you are doing at home," they say.

Two days later, Luderer felt better and showed signs of improvement, according to Brandy. He got out of bed and had dinner.

"It was a great day. He walked around the house and talked to us," Brandy said. Luderer is probably recovering. But by the evening of the same day, his symptoms returned.

"Ben always said that the night was a bad time. He was sweating and when he lay down he could not breathe," Brandy said.

Because Luderer slept in the bedroom and Brandy spent the night on the sofa, they talked by text. Suddenly, Luderer texted his wife and said "he is struggling". Brandy asked her husband if he wanted to return to the emergency room. Luderer answered that he was not sure either.

"I find ways I can help him feel better, help him breathe and calm down," Brandy said.

When Luderer fell asleep, Brandy left the room and heard English breathe through the door.

"I could hear through the door and know he was still breathing. Then I would sleep too," Brandy said. At two in the morning, she checked her husband again, everything was fine. But when she woke up at 6 o'clock, Brandy discovered her husband had stopped breathing.

Luderer left leaving a great question. Brandy knows her husband is infected with nCoV, but how could a healthy young man in his 30s and without a background condition like him get devastated by the virus so quickly?

Ben Luderer's story is just one of many cases that are confusing global health authorities. Why can so many young people with nCoV die suddenly?

In fact, Covid-19 has the most serious effects on the elderly, especially those with underlying heart, lung or diabetes conditions. The reason may be that the immune system of the elderly is not strong enough to fight off viruses and nCoV thus multiplying faster, invading the human body and causing the organ systems to collapse.

But looking deeper into other deaths, it was found that many, like Ben Luderer, were very young but still severely attacked by the virus and died.

According to data from the US Centers for Disease Control and Prevention (CDC), of 2,449 patients identified the age, 18% were between 45 and 54 and 29% were between 20 and 44. Of those who were hospitalized, 18% were between the ages of 45 and 54 and 20% were between the ages of 20 and 44.

Young people are less likely to die from Covid-19 but an unusual pattern seems to be emerging, as Dr. Anthony Fauci, director of the US National Institute of Allergy and Infectious Diseases, said. Covid-19 became "an unusual disease".

Scientists and researchers wonder if the answer lies in the genes of humans. They began to investigate what makes a difference in people with minor illnesses and those who die from nCoV.

One possibility lies in the variation of the ACE2 gene. ACE2 is an enzyme that attaches to the surface of cells in the lungs as well as the heart. In an article in Science, immunologist Philip Murphy from the US National Institute of Allergy and Infectious Diseases says "variations of the ACE2 gene that alter receptors could make the virus easier or more difficult. when invading lung cells ".

It is also possible that the condition is aggravated by surfactant, which allows the lungs to expand and contract better, depleted in some patients with nCoV.

To better define the pathological basis, it can take several months of research on many different patients, regardless of age. Currently, regardless of age and background or not, expert advice remains the same: Stay at home, wash your hands often and reduce your exposure to the virus as much as possible.

US health officials recommend that if symptoms appear mild, patients should stay home to treat. But if you experience shortness of breath, persistent chest pain, sudden cognitive abilities, poor skin, bruised skin and bruised lips, the patient should seek medical attention.

Luderer's wife says doctors have been unable to explain exactly what happened. "We don't really know? I don't really know," Brandy said.

Now, all she can do is count every minute, every hour, every day to adjust to the life that has changed after a blink of an eye.

"Ben and I are a couple who always do everything together," Brandy said. "So it's hard to know where I'm going with this sadness when I don't have a mate, who always does everything with me, beside me. I'm trying to understand everything."