How Can We Cure Chicken Pox And Avoid It From Spreading ? Can We Take The Skipped Vaccinations Now ?

hi i have a 5 year old who is 2 and a half years post bone marrow transplant due 2 haemophagytic lymthohistiocyotis, hes still sufferin low immune system and liver problems, he has just developed chicken pox but has not had his up 2 date immuninisations as of his illness, is there any thing i need 2 do. also hs 2 year old brother has got it now only a couple of spots, but hes eyes are very swolen and he kees rubbing them, what should i do for both f them