CV and mad panic behaviour

[LP]

“In today's CoronaCheck, we explain how statistics concerning COVID-19 cases among vaccinated people can mislead.”

https://www.abc.net.au/news/2021-08-06/c.../100353540

It’s always good to have an expert untangle the metrics ??

The following bit was probably the most informative, because it turns the Social Media tactics back on themselves.

In her blog post Professor McGowan outlined a situation in which 90 per cent of a group of 20 people were vaccinated. Four people in the group contracted COVID-19, including two who were unvaccinated and two who were, which means that 50 per cent of the infections were among vaccinated people.

By another measure, however, the same scenario showed that 100 per cent of unvaccinated people got sick, compared to just 11 per cent of vaccinated people.

In this case, the vaccine would be seen to be 89 per cent effective.

How many football pitches is that?