TLDR: > So it’s important to remember that (1) some of the coronavirus vaccines truly are more efficacious than others, (2) that the ones we have are only a sm

TLDR: > So it’s important to remember that (1) some of the coronavirus vaccines truly are more efficacious than others, (2) that the ones we have are only a small set of the ones that people attempted to develop, which means (3) that vaccines are still not easy. Infectious-disease vaccines have a better success rate in the clinic than most other areas of drug development, it’s true, but that just means that the chances improve from Godawful to Pretty Bad. We’re fortunate to have what we have, and that good fortune is the result of an awful lot of hard work. Basically, vaccines are hard work and we still can't just "whip one up" at the drop of a hat.