Herpes And Stomach Problems Is It Possible To Be Sick And Not Even Feel It, And Can Our Bodies Fight Multiple Illnesses At Once?

Is it possible to be sick and not even feel it, and can our bodies fight multiple illnesses at once? - herpes and stomach problems

People always assume when they are sick with something, maybe our bodies for many diseases at once? For example, you have two or three colds in your system at the same time, and something else like an STD, herpes, HIV, cancer, stomach have a problem (the list is long).

If yes, how our bodies handle it without dying? lol.

Then our body fight all these things at once?

If our body can not handle it happened, just unconscious and die? Or is it just 100X us sicker than usual, and end up in the emergency room?

How do you know when you are in very good health, and if not you, if our bodies are constantly fighting foreign invaders?

What is the measure of the health really? Is it entirely subjective?

Moreover, in addition to HIV and cancer and other preventable diseases, when rock never seriously ill and ultimately we can not all be 100% again, as we were before we get sick, if ever this big?

Thank you!