People have had success with Kenshield in preventing infectious skin diseases.
To further clarify the issue, herpes simplex virus infections can be quite problematic. It can be transmitted to skin and mucosa such as in eye infections, is quite painful, and is recurrent. MRSA is a bacterial infection, which as the name implies, is resistant to many antibiotic regimens. It can cause large carbuncles from which it can seed the blood system causing sepsis. It usually starts as a folliculitis when involving skin, at which point is fairly easily treated. Other diseases such as ringworm, a fungal infection, and moluscum contagiosum, a viral infection, are generally just a nuisance, being limited to the skin only.