I used to smoke cigarettes like one pack a day before but t…

I used to smoke cigarettes like one pack a day before but then I opened one of them and saw how many trash was inside and throw the pack away,buy rolling tobacco and reduced to 8-10 a day.During covid era my whole family had the virus (nobody smoke except me) and most people at my work but I didn't (even tested myself few times at home and doctor). I don't know was it because tobacco or ganja or my immune system