Immunity is a biological term that describes a state of having sufficient biological defences to avoid infection, disease, or other unwanted biological invasion.
It's a feedback of our organism for some un-usual conditions, like cold or hot weather, finger cut, virus, and so on.
Vitamins increase the power of our immune system, antibiotics - decrease.
Let's imagine that immune system is an ambulance of our organism: little cars, which go to the hotspot, problem zone.
First case, virus damage one of our cells, in the result, it doesn't do its usual tasks. In this case, our "ambulances" come to solve the problem. And when our immune system is not able to fix the problem, it needs more power. That is a vitamin.
Second case, virus damage only surface of the cell, it continues its usual tasks, but our immune system cannot respond that cell. Immune system "thinks" that this is some kind of virus. And try to "kill" it. In this case we need something to calm down our immune system, because it is trying to kill an important cell in our body. It's an antibiotic.
Of course don't use them without doctors receipt.
