Defense Against Invasion (1943) is a Animation, Documentary film that follows a doctor persuades a group of boys to be vaccinated by explaining how it will protect them against disease. Animated sequences depict the body metaphorically as a city, defended by the blood cells, which are stimulated by vaccination to amass arms and ammunition, in order to defend the city when it is invaded by germs. Defense Against Invasion is not currently listed with streaming providers in your selected region, but availability can change over time. It has a user rating of 4.3 out of 10 from 6 votes. Fans of animation movies may also want to explore similar titles below.