Assumptions Blood clots: is there a there Kaiser looks at the controversy over blood clots and the Astrazeneca vaccine.
Cause-effect Real-world studies: limits of knowledge Kaiser focuses attention on a few aspects of the Mayo Clinic real-world effectiveness study.
vaccine trial One-dose Pfizer is not happening and here's why Kaiser explores what the Pfizer vaccine trial data say about a one-dose treatment.
Covid-19 The Swedish mirage: the verdict is already written Kaiser asks whether we need more time to evaluate Sweden's approach to coronavirus.
Behavior I don't like the term herd immunity Kaiser explains why the term "herd immunity" is problematic