2 to 3 days is what we've seen in most countries during the exponential phase. Some countries in Northern Europe have had values down to 2 days or less, but tha

2 to 3 days is what we've seen in most countries during the exponential phase. Some countries in Northern Europe have had values down to 2 days or less, but that was when they were ramping up their testing like crazy. (3 days was also the number I used one week ago to state "at least two of France, Germany, Spain and Switzerland will be in lockdown and with hundreds of deaths one week from now"[1], and boy was I right). [1] https://news.ycombinator.com/item?id=22528433 https://news.ycombinator.com/item?id=22528433