CV and mad panic behaviour

[LP]

For those of you concerned by the various reports of various vaccine efficacy from 96% to 60% or less, know that efficacy as measured and reported is a very grey area, it's not a cut-off figure it's a gradient.

A vaccine that reduces symptoms can be just as effective as one that prevent infection, but how that is reported varies across global regions, and from study to study. For example, it could well be the case the Pfizer(96%) and Oxford(66%) vaccines are equally effective if reported under the same regime.

For example a vaccine might be reported as 50% efficacious because half the treated people still get infected, but it might be 100% effective at preventing acute symptoms. But how that is reported depends on the type of study and where it was conducted.

I asked a question of a researcher at CSIRO. What level of effectiveness makes a vaccine worthwhile? They replied they accept anything above 50% as being a very functional vaccine, apparently many of the seasonal shots we get can be as low as 30% efficacious, but that doesn't mean they do not still diminish an infections symptoms.