How does your immune system respond to the covid-19 virus?
(Different cells and such)

I'll take a gander at your question

Explanation:

Your immune system, has defensive cells that will automatically start to defend your body against the on-going internal pandemic.

If your Immune system is weak, like someone with an auto-immune disease or  a weak Immune System. They will most likely experience the worst of the virus.

If you have a strong Immune System, you should most definitely be okay with basic treatment. You won't die, but you won't be cured either.

There's even a Tweet giving instructions on how to do self-treatment

it would be heredity