Which technique involves vaccines or chemoproph prophylaxis to prevent disease even if contact with vectors cannot be avoided?

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This question is about preventing disease even when you can’t avoid contact with disease-carrying vectors, by using vaccination or preventive drugs. Vaccines train the immune system to recognize and fight off a pathogen, so if a vector bite transmits it, the body can mount a faster, more effective defense and typically prevent illness or lessen its severity. Chemoprophylaxis uses medications taken before or after exposure to block the pathogen from causing disease, acting like a chemical shield that reduces or prevents infection after contact occurs. This approach directly reduces disease risk despite exposure, which is different from physical barriers that aim to stop contact in the first place, or surveillance and record-keeping, which are about monitoring and managing information rather than preventing disease after exposure. For example, vaccines protect against certain vector-borne diseases, and antimalarial prophylaxis helps prevent malaria illness in people who may be bitten by infected mosquitoes.