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This is a blog about Covid-19 from a mathematical angle.

Updated daily	Trendgraphs, CasesByAge, Omicron BA.2 vs BA.1
Updated hourly	LondonTraffic
5 Jan 2022	Estimating Generation Time Of Omicron - Evidence of a much shorter generation time for Omicron compared with Delta
2 Jan 2022	Growth/shrinkage of Omicron and Delta in regions of England
2 Dec 2021	Early Omicron Growth Estimate
16 Nov 2021	Population estimation using vaccine survey - A third way to estimate population in the UK (unfinished)
Jan-July 2021	Vaccine effect
30 May 2021	Measuring growth in the UK in Variant of Concern B.1.617.2 / Delta (first found in India)
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"

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