How does the Covid-19 vaccine work? We interviewed Bill Gates to get his thoughts on the vaccine and pandemic. Read Bill and Melinda Gates Annual Letter here: http://gatesnot.es/2Yoy65f

Watch our other videos for the Gates Annual Letter:
What's inside a Water Filter?    • What's inside a Water Filter?  
What's inside a Microscope?    • What's inside a Microscope?  
What's inside an Electrical Transformer?    • What's inside an Electrical Transformer?  

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