Just in case anyone is concerned about how fast the COVID-19 vaccines were produced: it is because they are variants of the SARS vaccine, which we've had for more than a decade.

COVID-19 can be treated with a variant of the SARS vaccine because COVID-19 is a variant of SARS. The virus that causes SARS is SARS-CoV, and the 2019 novel coronavirus is SARS-CoV-2.

Because of this, researchers had a vaccine ready for testing as early as January 2020. The COVID-19 vaccine had, in fact, nearly a full year of testing and refinement. It is not by any means "experimental" or "untested".

@noelle and to answer the other question people have: they can run the different stages of the drug trials almost simultaneously, that makes the process a lot faster. especially if you have a LOT of subjects and a LOT of opportunities to be infected.

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@gzt @noelle I'm still waiting on J&J to do tests on immune compromised people that was scheduled for Q3. The moderna one done on people on immune suppressant drugs for organ transplants suggested that it may not function well.
hopkinsmedicine.org/news/newsr

This is often what people mean by "untested".

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