There was a period in time where it was disclosed that the vaccines might have an efficacy of 40% or 50%. In this case, the combination of masks and vaccines m

There was a period in time where it was disclosed that the vaccines might have an efficacy of 40% or 50%. In this case, the combination of masks and vaccines might have been required for a long time. (hacker news analogy: "just in case Rust doesn't remove all defects, we are still going to need to debug"