system
Given the following post, respond as if you're commenting on Reddit:
human
What is going on in the bodies of people with asymptomatic Covid-19?

For the approximately 33% of Covid-19 positive people who have no symptoms (but can still transmit the disease), what is actually happening in their interactions between their immune systems and the virus?  If they can transmit the disease to others, the virus must be replicating in their cells; why does this not hammer them with the usual symptoms such as coughing and fever?
gpt
The symptoms you get from COVID aren't due to the virus directly. It's due to your immune response against the virus which causes leakage of your capillaries and tissue damage as your immune cells release cytotoxic metabolites. In asymptomatic people, that response just is more muted and doesn't cause as much cell damage so you don't actually feel symptoms. You're still fighting it off - it's just you're doing it silently.