Public Health

Using Ovid's Advanced Search, with the map to mesh option,

Search: public health

Result: Public Health

However, if you check the scope note for Public Health, it makes reference to Public Health Administration.

And, I remembered that there is also a subject heading: Public Health Nursing

The map to mesh option returned all of these, plus one more, with the search: public health*

The other result that it returned was: Public Health Practice

CINAHL headings:
-Public Health
-Public Health Administration
-Public Health Nutrition
-Community Health Nursing

EMBASE headings:
-Public Health
-Public Health Service
-Community Health Nursing

Update 2016: now there are more!

Full list for PubMed:
"Public Health"[Mesh] OR "Public Health Administration"[Mesh] OR "Public Health Nursing"[Mesh] OR "Public Health Practice"[Mesh] OR "Public Health Informatics"[Mesh] OR "Public Health Surveillance"[Mesh]