In his April blog post on COVID-19 vaccine development, Gates explains how a new rushed to market COVID-19 vaccine is likely to be a RNA vaccine. With an RNA vaccine, “rather than injecting a pathogen’s antigen into your body, you instead give the body the genetic code needed to produce that antigen itself.” Gates admits the process is risky. “It’s a bit like building your computer system and your first piece of software at the same time.”

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