Maintain personal hygiene
We have spent quite some time on describing tips to help improve your immunity. But the truth is, that the best boost for immune system is the prevention of many foreign organisms from entering our body.
The single best way to do it is to maintain personal hygiene. Washing your hands properly, wearing a mask in public and crowded places, and avoidance of touching your face with dirty hands can save the immune system a lot of work. Eventually, it leads to fewer pathogens entering the body, decreasing the risk of infection.