Back in 2020, my adult son and I both contracted some kind of virus (we never got tested for COVID19) that affected our lungs. We both felt like an elephant was sitting on our chests - somewhat painful. Also coughing.
Anyway, I pulled my Osha Root tincture out of my cupboard. It cured both of us within 2-3 days. The virus reoccured about six times over the past 18 months. I again dose myself with Osha Root and it goes away. Osha Root is particularly good for the lungs. It has been used for thousands of years by First Nations peoples.
My favourite health food store lady tells me that she has had many post-covid/vaccine injured clients and has had great success with serrapeptase (for clearing clots) and pycnogenol. I have also read that l-lysine is very helpful.