If you take the low end of the prevailing IFR estimates (~0.5%), the 5700-odd deaths would mean an infection rate of ~12% in London (population ~9M). If you ass

If you take the low end of the prevailing IFR estimates (~0.5%), the 5700-odd deaths would mean an infection rate of ~12% in London (population ~9M). If you assume 40% of deaths are not properly reported as COVID-19, that gets you to around 20%. But NYC, with a similar population, has had three times as many confirmed deaths, and antibody tests there suggest a total infection rate of 20%. LA antibody tests indicated something like 4%. I'm betting that when antibody tests are done, London will be lower than 20%, and the other areas are likely at the low end, or below, this estimate of 5-14%.