I have no symptoms since I never get sick even with flu or with anything else. I can't actually remember last time I got sick with the flu, probably no more than 1 or 2 times in my whole life.
I think I saw a lot of comments on different videos and forums of British and US people having experienced stronger "flu" symptoms even back to November/December 2019 period so I think this thing might have even occurred naturally (or maybe not) and it's a more aggressive version of the flu.
On the other hand, I think a lot of people rely too much on health products, personal care, cleaning products, etc. I do not compulsively wash my hands everytime I go out and come back. A lot of times I eat with hands I've had on my camera for a couple of hours and having touched other things, too. I think it is a strong reason why I have a strong immunity and never get sick, cause I allow my body and immunity system to handle dirt and viruses from time to time.
Also, I wash my hair very rarely, let the scalp fat settle in and my hair is much healthier than all the women and most men I know. I think our society in general has become too self protective and cleansing and "detoxing" and all that. Too many handwash, sanitizers, shampoos, too many floor disinfecters, too much. That's me.
Throughout this whole winter and spring I have felt nothing unusual, keep going strong.