FYI Geneva did a representative study: https://www.hug-ge.ch/medias/communique-presse/seroprevalence-covid-19-premiere-estimation https://www.hug-ge.ch/medias/c

FYI Geneva did a representative study: https://www.hug-ge.ch/medias/communique-presse/seroprevalence-covid-19-premiere-estimation https://www.hug-ge.ch/medias/communique-presse/seroprevalenc... They estimate ~27k infections on April 17th, for comparison right now for that canton the authorities declare 213 deaths (likely undercounted afaik those are only deaths at hospital) and 4726 confirmed cases. So a lower bound of 0.7% for IFR seems reasonable (and in line with other studies)