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# Covid-19 Talk: 'Basic Reproduction Numbers, Effective Reproduction Numbers and Herd Immunity' by Tom Britton

Basic Reproduction Numbers, Effective Reproduction Numbers and Herd Immunity

Lecture on 02/07/2020, Thursday 18:00 CET (Paris-Berlin-Rome) - 5:00 p.m. GMT (London)

Title: Basic Reproduction Numbers, Effective Reproduction Numbers and Herd Immunity

Speaker: Tom Britton

Abstract: We start by defining some basic concepts for the simplest epidemic model and then extend the results to a wider class of epidemic models allowing for some population heterogeneities. We end by showing an important new result: the disease-induced herd immunity level $$h_D$$ is smaller than the classical herd immunity level $$h_C=1-1/R_0$$.

The COVID-19 Epidemiological Modelling Project has started a series of talks on the pandemic. Previous talks can be viewed again on YouTube:

SARA Systems Streaming

This channel is also used for live streaming of the talks. For participants who like to take part in the discussion this Thursday, use the Zoom URL

https://us02web.zoom.us/j/84316972876

Meeting-ID: 843 1697 2876

Some of Tom's simulations can be viewed here.