Z20 Contact with and exposure to communicable diseases

Z21 Asymptomatic human immunodeficiency virus [HIV] infection status

Z22 Carrier of infectious disease

Z23 Need for immunization against single bacterial diseases

Z24 Need for immunization against cartain single viral diseases

Z25 Need for immunization against other single viral diseases

Z26 Need for immunization against other single infectious diseases

Z27 Need for immunization against combinations of infectious diseases

Z28 Immunization not carried out

Z29 Need for other prophylacticf measures