prophylaxis

n [U] (fml 文) preventive treatment against disease, etc （疾病等的）预防.

propagator, propane, propel, propellant (also propellent), propellent, propeller, propelling pencil, propensity, proper, proper fraction, proper name (also `proper noun), properly, propertied, property, prophecy, prophesy, prophet, prophetic, prophetically, prophylactic, propinquity, propitiate, propitiation, propitiatory, propitious, propitiously, proponent, proportion, proportional, proportional representation, proportionally, proportionate, proportionately, proportioned, proportions, proposal, propose, proposer, proposition, propound,