How long after immunisation does it take to get immune to chickenpox and be able to work in contaminated environments? T

[answerhappygod]

How long after immunisation does it take to get immune tochickenpox and be able to work in contaminated environments? Theonly significant hospital-acquired infection ismeticillin-resistant Staphylococcus aureus (MRSA), right? Does aClostridium difficile infection require the use of antibiotics? Whydo some rheumatic fever patients eventually develop persistentrheumatic heart disease? What is the World Health Organization'sadvice for rheumatic fever prevention following a streptococcalthroat infection? Does rheumatic fever have an immunological orinfectious cause? Why do people who have rheumatic heart diseasehave migrating polyarthritis?