M RNA vaccines instruct cells to make foreign protein fragments for immune recognition.

“So, if you think about mRNA vaccines, it's like an envelope with a message in it. And that message is going to tell the cell what kind of proteins to make. This is exactly what happens, by the way, when you get a viral infection. When you get Coronavirus or any other Coronavirus, or any other RNA virus that comes along is that virus fuses with your cell, whether it's in the cells in your nasal mucosa or anywhere else. And it basically tells those cells to make foreign proteins. And so, in that sense, this is no different. We're just doing it in a way that doesn't cause more viruses to be made.”