get EVERY cold/flu that goes around; did you have the same problem, and if so, did increasing NK cells help make you robust & resistant to colds/flus?
I am similar in that I seem to pick up every virus that goes around but not flu thankfully. I am not sure if I have had Covid at the beginning of the year but today did the Abbott's antibody test which will tell me one way or another.
Andrographis is always in my cupboard and is my go too remedy when a virus hits me that seems especially bad. What I now do AT THE FIRST SIGN OF VIRUS which for me is usually a sore throat or twitchy nose I drop pure Echinacea Augustifolia down my throat every few hours together with Biocidin throat spray. I also do salt sniffing at least 3 times a day. Usually these measures will get rid of any virus within 3 days but if this doesn't work as it didn't when I had severe mystery virus at the beginning of this year that went on for several months on and off I then take about 4 double strength Andrographis capsules as well as the other herbs.
Rarely now do I need antibiotics but it did happen this year just once because I got so unwell.
I feel it does give me migraines but there again most things do! I ended up this year taking it daily for many weeks.