So your entire family have essentially become lepers? Have you arranged to start homeschooling DS in the fall? (I did not mean that seriously.)
Call your state health department and ask them to tell you in detail what your DS and you as a family need to do to keep everyone else safe. Have them tell you everything you can think of to ask about the infection your son is suffering from.
When you get an answer, start making one-to-one family phone calls, and tell your relatives what you have been told by an honest-to-goodness state epidemiologist. If that was not what you were doing, apologize. If it was essentially what you were doing, ask what else they would like to do in order to keep your son from being shunned by the rest of the family. Whatever the epidemiologist says is the best-case protocol, do that. If that is a part-time job, well, it can’t be helped. If the epidemiologist recommends home-schooling, try to get that done, but I don’t think that is going to happen.
Or just look at what the CDC says:
cdc.gov/niosh/topics/mrsa/
This includes;
If I have staph, or a MRSA skin infection, what can I do to prevent the spread of MRSA at work and at home?
You can prevent spreading staph or MRSA skin infections to others by following these steps:
•Cover your wound.Keep areas of the skin affected by MRSA covered. Keep wounds that are draining or have pus covered with clean, dry bandages. Follow your healthcare provider’s instructions on proper care of the wound. Pus from infected wounds can contain staph and MRSA, so keeping the infection covered will help prevent the spread to others. Bandages or tape can be discarded with the regular trash.
•Clean your hands.You, your family, and others in close contact should wash their hands frequently with soap and warm water or use an alcohol-based hand sanitizer, especially after changing the bandage or touching the infected wound.
•Do not share personal items.Avoid sharing personal items such as uniforms, personal protective equipment, clothing, towels, washcloths or razors that may have had contact with the infected wound or bandage.
•Talk to your doctor.Tell any healthcare providers who treat you that you have or had a staph or MRSA skin infection.