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b'Brothers Ian, Sam, and Eli want to know, \\u201cHow do vaccines keep our bodies healthy?\\u201d We meet two scientists, Omar Khan and Jasdave Chahal, who have teamed up to tackle the world\\u2019s most dangerous diseases with a new technique for developing vaccines. They tell the story of how they came together in a quest to battle biological \\u201cninjas\\u201d that want to invade our bodies and make us sick. \\nAre you a teacher or homeschooling parent? Tell us how you use Tumble! Email us at tumblepodcast@gmail.com. We love hearing from you!\\nWant an ad-free version of Tumble? It\\u2019s only $1 each month. Pledge on Patreon to get access to this special podcast feed, including Marshall\\u2019s original music. \\nLet us know how you use Tumble. Send us your questions and drawings! Don\\u2019t forget to subscribe and leave us a review on Apple Podcasts or Stitcher. Thanks for listening!'