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This is a blog about Covid-19 from a mathematical angle.
| Updated daily | Trendgraphs |
| Updated daily | LondonTraffic |
| Updated daily | Vaccine effect |
| 8 May 2021 | Measuring vaccine efficacy against variants |
| 15 March 2021 | Estimate for the false positive rate / specificity of lateral flow device tests as used in UK schools |
| 6 December 2020 | Discussion of optimal suppression strategies |
| 23 September 2020 | Critique of a YouTube presentation by Ivor Cummins |
| 19 May 2020 | Note on Gomes et al, "Individual variation in susceptibility or exposure to SARS-CoV-2 lowers the herd immunity threshold" |