But you in your home are unlikely to be able to diagnose whether an illness is bacterial or viral, and so sometimes you will be exposing yourself to anti-biotic

But you in your home are unlikely to be able to diagnose whether an illness is bacterial or viral, and so sometimes you will be exposing yourself to anti-biotics for no reason. That's not a risk-free option. You might be happy with the amount of risk, but I doubt you know what the level of risk actually is. > doctor will refuse to prescribe a drug which all parties know will cure the infection Mostly it's doctors saying "we don't know if this is viral or bacterial, and by the time the tests come back it will have cleared up", or they're saying "this is a self limiting condition with no long lasting effects and taking antibiotics will shorten the duration by only half a day".