Profylaksian
Profylaksian is an adjective used to describe actions, measures, or agents that are intended to prevent disease or its spread before it occurs. In practice, it is essentially synonymous with prophylactic or preventive, though profylaksian appears mainly in historical medical texts and in transliterations used in some non-English languages.
Etymology and usage notes: The term derives from Greek roots meaning guarding in advance (pro- and phylaxis).
Applications: In medicine and public health, profylaksian concepts cover vaccination programs, preventive medications before procedures, and
Terminology and current usage: Today, profylaksian is rare in contemporary English. The preferred terms are prophylaxis