Pet Vaccination in Dubai, Abu Dhabi and Sharjah. Vaccines are biological agents administered to a healthy animal in order to give that animal immunity against a specific disease or condition. Vaccinations generally contain minute doses of de-activated microorganisms that in their live state, could potentially cause illness or disease. Introducing a minute amount of the de-activated agent of a vaccinatable disease causes the body to recognize it as an invasive agent without being exposed to the risk of the live form of the infection or organism. This triggers the immune system of the dog to fight off the agent, and so, build up antibodies against it that will remain in place to fight off the live form of the micro-organism in future, should the dog become exposed to it.