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  • Chris Jewell's avatar
    Change to Rt calculation to fix discretisation error · 35f04b91
    Chris Jewell authored
    Investigation showed that the high rate of cases in the UK in January
    caused a significant discretisation error between the chain binomial
    model and continuous time analogues.  The previous Rt calculation
    made use of a continuous time approximation, and so gave biased
    estimates of Rt.
    The new implementation calculates Rt using expectations of the chain
    binomial model in terms of transition probabilities, not rates as