What are your biggest concerns about the vaccine?

What are your biggest concerns about the vaccine?
There are several different types of vaccines in development. All of them teach our immune systems how to recognize and fight the virus that causes COVID-19. Sometimes this process can cause symptoms, such as fever. These symptoms are normal and are a sign that the body is building protection against the virus that causes COVID-19. Learn more about how COVID-19 vaccines work CDC

Personally I’m not sure of it myself?
What are your biggest concerns about the vaccine?
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