@dr.lewicki.phd: Tested on thousands. Given to billions. 💉📊 How a vaccine is tested before it reaches you: lab, animals, phase 1, 2 and 3 trials with placebos, FDA review, and years of safety watching. Then the big wins, drawn out as you listen. What is a placebo, and why do vaccine trials use one? 👇 Fast on purpose: you don't have to catch it all the first time. Replay it a few times and more sticks with each listen. 🔁 Full video on YouTube: https://youtu.be/IXFFdJcBmgI #vaccines #sciencesong #vaccinesafety #teachersoftiktok #EduTok

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Saturday 07 November 2026 17:31:36 GMT