Thanks, interesting. It might be the case that the app would only be useful once the levels of infection increase, or perhaps the app would only instruct the us

Thanks, interesting. It might be the case that the app would only be useful once the levels of infection increase, or perhaps the app would only instruct the user to send an alert when they had developed a fever + dry cough, which seems more typical of this virus. > But at some point, specialized per-person notification is no better than general advice to the entire population. I take your point, but I think targetted "you have had a good chance of being exposed" is far more likely to result in action than "minimise contact with other people if possible". A preprint of a paper which looks like has similar ideas but some more formal modelling: https://www.medrxiv.org/content/10.1101/2020.03.08.20032946v1 https://www.medrxiv.org/content/10.1101/2020.03.08.20032946v...