2D Immunity Intro Videos

I need a series of short, 90-to-120-second 2D animated clips that clearly introduce the concept of immunity to a general audience. Each video should break down one key idea—such as innate vs. adaptive... (Budget: $250 - $750 SGD, Jobs: 2D Animation, 2D Animation Explainer Video, 3D Animation, Adobe Animate, After Effects, Animation, Toon Boom, Video Production, Video Services)