- The author retracted the original blog post, admitting that earlier conclusions about herd immunity were incorrect.
- The post originally reviewed two scientific papers suggesting herd immunity thresholds could be lower due to individual variation in susceptibility.
- The author warns that non-experts should avoid writing about COVID-19 unless they are certain they can contribute usefully.
- The retraction highlights that understanding of respiratory disease pandemics, including herd immunity, was incomplete at the time.