Probabilities of Covid-19
Kaiser looks at how probabilities lie behind the science of vaccines.
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Blood clots: is there a there
Kaiser looks at the controversy over blood clots and the Astrazeneca vaccine.
Real-world studies: limits of knowledge
Kaiser focuses attention on a few aspects of the Mayo Clinic real-world effectiveness study.
Vaccine researchers discard the start-at-zero rule
Kaiser revisits the practice of manipulating the vertical axis of a column chart.
Vaccines free you from the herd
Kaiser looks at covid-19 vaccination campaigns.
Cutting infection rate by half is not the same as protecting half the people from infection
Kaiser explains what 50% vaccine efficacy actually means, and it's not what you think.