Question

why the virus can't attack more immunity person
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Answer 1

Answer:

because of their immune response .It can affect any one but It will get cured

Explanation:

hope it helps

Answer 2

A cascade of viral particles enters the body through the nose, eyes or mouth. Breathing carries some of these particles to the lower respiratory tract where the spike proteins of the coronavirus, acting like a key, lock into epithelial cells that line the respiratory tract as well as those in the the airsacs in the lungs. SARS-CoV-2 is able to stay undetected longer than many flu or coronaviruses and its spike proteins are able to gain entry by unlocking the ACE2 protein on the lung cells. Once in, they hijack the cell’s machinery, replicate and multiply and infect adjoining cells. Like the defining ACE2 proteins on the epithelial cells, viruses too have a tell-tale signature on their surface called antigens and spotting these is what kicks the immune system into action by producing antibodies.

The signals they generate trigger another class of chemicals — cytokines and chemokines — and they alert the immune system to send an array of different kinds of cells that specialise in destroying viral particles. However, these cytokines and chemokines trigger inflammation in the cells. In the nose and upper regions of the respiratory system, this inflammation produces mucus and a runny nose to trap viral particles and prevent their ingress. This also triggers sneezes to expel them. When the sinuses are inflammed we get a headache and the general stuffiness that we associate with a cold. When a gland called the hypothalamus is inflamed, it results in a fever.

However, in the case of SARS-CoV-2, the virus seems better at penetrating deeper. The inflammation triggers a fluid build-up in the lungs. The fluids also contain the residue of a host of specialised cells — including T cells — that carpet bomb and damage many of the body’s own cells as well as the viral particles. It is in expelling this fluid that a dry cough, characteristic of the coronavirus infection, begins. As more airsacs are infected, the lungs find it harder to perform their core job of extracting oxygen from the air, and eventually, this aggravates breathlessness.

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