1. Duh. Of course, there are new strands, it's a virus. New strands happen all the time, because when the virus hijacks your cells to duplicate itself, it doesn't always make an exact copy of the virus's DNA, so new strands are created.
2. I am not gonna pretend I know how a respiratory disease of the lungs affected your cousin's brain to have a stroke, but okay. And paralyzation would be a symptom of the stroke, same with migraines and sensitivity to sounds, not sure about how bad loud noises would be.
3. I know you didn't say much about this, but I don't trust the vaccine coming out. Covid is a virus, not a bacteria, you cannot have antibiotics or a vaccine for a virus. The flu shot is not a true vaccine either. Vaccines are formed using antibiotics and are used to fight bacterial infections. Antibiotics don't work on viruses because they are a different type of germ. Plus, a lot of people can't have a flu shot, it will make them sick with the flu. So if the covid vaccine is something similar to that, a virus vaccine, what the heck is in it? Testers have had a bunch of allergic reactions and developed HIV/AIDS from it. So yeah, I don't trust that at all. I may just be paranoid, but no thank you.