Why some die some survive ?

looks like a hoax but there is logic behind it:

Why some die some survive ? The answer I was looking for was finally found. We know that the younger the person infected with covid, the better the chance of cure. But there are many young patients in their 20s, 30s, and 40s who also died of the virus. I first thought it might be because of different personal built and immunity but I had no real answer.
I found the answer today in this article, written by an English doctor. I think he is right. He said that when a person infected with the virus, how sick he was going to be depends on how much the viral load (amount of virus), (of course there are other factors). A person who gets a viral infection has an incubation period, explaining why there may be no symptoms for the first 1 to 14 days. This is because the symptoms will not occur until the amount of viruses is sufficient to cause the symptoms. This explains why it is necessary to quarantine for 14 days .One may be infected with the virus but with no symptoms. !
If you were in a very crowded place, like a room, a classroom, a religious gathering, if many people inside carried the virus, they could spread a large amount of viruses onto your body at once. Because of the large amount, the virus multiplies quickly, and your body do not have enough time to produce antibodies to fight the virus! So one dies of the viral infection.
The immunity of young people is relatively stronger. But if the virus comes in a large amount at one time, the body doesn’t have enough time to produce the immunity, to fight it. So young people also succumb to the decease! The article also explained that some elderly people may only have a little viral load when they got it, so their bodies could have sufficient time to produce antibodies to fight the virus. So they recovered. This explains why at the hugh religious gathering in KL last month, so many people got them, so many people die. It also explained why so many people mon some cruise ships got very sick and many died. This is because they were in a very crowded place. The viral load on contact was too much for the body to mount an appropriate large enough immune response in time. The above explanation was provided by a British doctor. I think his deduction is very logical. He finally advised everyone to be isolated and keep their social distance. Don’t involve in large gatherings. So, if you were unlucky to be infected with the virus and it is only passed to you by one person. The amount of virus load is small and your have sufficient time to mount an adequate immune response. Chance of recovery is a lot higher. I am so happy to come across this article which gave me the answer I was searching for. Although I believe there were many other factors (heart disease, diabetes etc) as to why some die some survive, the viral load is certainly one of the explanations .