Both of these factors are much more uncertain than is being reported. When we account for them in our model, we discovered high community infection rates in many regions across the world. For Kobe, Japan, our model suggested that
over 800 times morepeople have had Covid-19 than has been reported. For England and Wales, this figure is
28 times more. As for the fatality rate, the team
from Imperial College has previously estimated this number to be 1%, but this is uncertain. The team states that its model “relies on fixed estimates of some epidemiological parameters such as the infection fatality rate…”, while also acknowledging that “amidst the ongoing pandemic, we rely on death data that is incomplete, with systematic biases in reporting, and subject to future consolidation”.When we adjusted for these uncertainties, we discovered that the fatality rate estimates are most likely to be in the range 0.3%-0.5% for the countries/regions we considered.