The insignificant nobody me is NOT a medical doctor, thus I am not qualified to answer your question. It would be best to talk to a few doctors, in order to get a grasp of the COV situation.
All that I can do is to share experiences, with a fellow Human & citizen...
COVid 19 & its various permutations & variations, are of the COV family line that had LONG existed even before Humankind existed. Throughout Human history, it had been known by many names across nations & culture states, such as the plague, black death, etc throughout our World, from Europe to China as recorded history had proven, by its often similar symptoms.
It is a force of Nature, exists within Nature, and NO mortal has the ability to win against Nature, only to ADAPT to it. To wipe out COV, not even draconian China that boasted of such aims but only eventually saw its citizens & economy suffered from such foolishness...
Current modern science advancements had microscopically IDENTIFIED the COV virus - thru the various SPIKES that this virus has that latches upon the Human cell in attempt to take over it & replicate it, mutating the Human cell for its own survival thru replication of cells.
Fortunately, the Human body has its own immune system - T & B cells to destroy the virus, & acts as a shut down switch to prevent the virus from further replication, to raise the body temperature till organ failure occurs, to destroy BOTH the host ( Human ) & virus which cannot exists in Human body above 38C, before the virus can spread further with its harmful mutation to others.
COV affects mostly those whose immune system had been weaken, by birth, aged or neglect. It is often these that suffer the worst & may even face death.
For majority that are not of the 'at risk' groups, the Human Immune system would be able to battle the virus, but it MUST be with help from the Human host - enough sleep, rationally moderate exercise & proper diet.
Very often, due to the stresses & pressures of daily living to put food on the table for loved ones, one's personal health especially our Immune system regeneration is neglected. Thus many get re - infected again & again.
So if one does not want to get re-infected with the COV virus, the best is to take care of one's immune system, especially for those whom are not at the 'at risk' group.
For those whom are within the 'at risk' group, COV is often the killer. Thus they will have to make the decision to seek further medical help to help enhance their immune system, & know the therapies needed such as isolation, masks, etc to stay alive, even if it is only a bit longer as no mortal lives forever.....