We provide the necessary vaccinations and immunizations for patients to maintain their health while travelling and at home. How do Travel Immunization Services work? Travellers are shielded from serious illnesses by vaccines. You might come into contact with diseases like yellow fever, which are uncommon in most countries, depending on where you travel. You may also need to get certain vaccines if you want to travel to certain places. When you travel, getting vaccinated will help keep you safe and healthy.