This can be further combined with a single term in one other field. All licenced HIV vaccines. 30 records retrieved. Besides controlled indexing terms described in the the microthesaurus , all entries are indexed to considerable depth with keywords, synonyms and related terms. Terms are currently both left and right truncated, but this will be changed to the usual default right truncation.
Terms are case sensitive.
Formal biological, chemical and other nomenclature are used in both the Abstract and Subject fields along with common terminology. The database searches for continuous character strings. What you cannot do.