Tertiary Prevention
Intervention after a sign or symptom is present, to reduce the likelihood of persistence or progression. ([http://dx.doi.org/10.1136/jech.55.7.452](http://dx.doi.org/10.1136/jech.55.7.452))
Intervention after a sign or symptom is present, to reduce the likelihood of persistence or progression. ([http://dx.doi.org/10.1136/jech.55.7.452](http://dx.doi.org/10.1136/jech.55.7.452))