@WHO: How do #VaccinesWork❓ 1⃣ Vaccines contain weakened non-dangerous parts of an antigen 2⃣ It's enough that our body can learn to build the specific antibody 3⃣ This will prompt our immune system to respond & defeat the real antigen in the future 👀 Watch for more 👇 #COVID19 https://t.co/xDeMrJ59Ms

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