| A key step in the control of any communicable disease is the separation of the infective agent from the susceptible hosts. |
| These common communicable diseases cannot be eliminated if the levels of immunisation in the community fall below a critical value. |
| Children whose parents opt not to vaccinate decrease herd immunity, which protects populations from communicable diseases. |
| Some of our friends here are suffering from communicable diseases like scabies and coughs. |
| It requires donor screening and testing to prevent the transmission of communicable diseases. |
| Patients who are immunosuppressed and have chronic infection and severe anemia may be communicable for months to years. |
