Boosting the Immune System is a horrible idea that is used by people trying to make you buy useless stuff! Luckily the danger is pretty mild that you could actually boost your immune system since basically nothing you can buy legally actually does it! Even the mere term “strong immune system” is a misnomer. Over everything else, you want a balanced immune system. Homeostasis. Aggression and calmness. You want elegant dancers who remember the choreography really well over pumped-up rugby players who want to smash stuff. In all likelihood, your immune system works exactly as intended.