[theold]

There is no single unifying cause of all long Covid, but scientists are focusing on four main areas:

Blood-clots and damage to small blood vessels (micro-clotting)

A disturbed immune system

People are still infected with the coronavirus

Impaired metabolism


https://www.bbc.com/news/world-60708123

[theold]

The virus can damage the lungs, heart and brain.

Lungs: Cough, Flu, Breathing

Brain: Headache

https://www.mayoclinic.org/diseases-cond...t-20490351