I haven't been sick with the flu for what feels like forever, it was probably 10 years since I had a really bad cold, and as always, it gets resolved by simply by allowing the natural immune system do it's thing, as long as it is not overburdened trying to deal with inflammations.
I would very likely be able to attribute my good health to LCHF, cutting carbs from grains and avoiding overly processed foods and additives.
Cutting all vegetables recently, having a more meat, organ meats, bone broth centric diet seems to be doing my health even more favors.
If the 'health institutions' wanted people to do well, they would say, get sunshine, get fresh air, remove inflammatory foods from your diet and avoid hazardous chemicals, and get at least some moderate exercise.
They did the exact opposite, get no sun by sitting indoors all day for lockdown, get no fresh air because of masks, keep eating bs labelled as 'food' and they closed down all gyms and places for exercise.