The paper explains how, these are not my figures but they do seem credible, this is the modelling team advising the uk gov and the gov has adjusted their strate

The paper explains how, these are not my figures but they do seem credible, this is the modelling team advising the uk gov and the gov has adjusted their strategy to suppression in response (the tactic in China), but the economic impact of that is pretty dire too, and it means tough choices. The measures in China were draconian and long lasting (large cities on lockdown for months), and they managed to contain it because they were first hit and it had not spread far. It has already unfortunately spread widely in the UK and US.