system
Given the following post, respond as if you're commenting on Reddit:
human
If there’s no treatment for Coronavirus, how do people recover once hospitalized in critical condition?
gpt
Essentially, people hospitalized for COVID-19 are not being treated for COVID-19, they are being treated for its symptoms, which are what kills the most people.

Namely, respiratory difficulties caused by the virus can kill, but can also be alleviated with assisted respiration equipment.

If done right and without too many complications, these band-aids on the lethal symptoms can keep the person alive long enough for their body to develop effective antibodies and, eventually, beat the virus down and become immune through their own immune system.

For this, a functional immune system is still required. If the immune system is too slow, or too weak, it's possible the body might never be able to defeat the virus, or may end up having to deploy its biggest guns because there's too much of the virus everywhere in the body, at which point the immune system can simply kill the person. This is why older victims and those with immune system preconditions are more at risk.