Heard the official advise in germany, where testing is easy to come by and, as the originator of the most widely used test, has been available quite early. The health institute (Robert-Koch-Institute) expects that around 60 to 70% of the population will be infected as long as no vaccination is available as there is no immunity against it and that is the figure needed for herd immunity. That said, quite a large number of the infected will not display any symptoms, therefore will usually not be tested, generating quite a large hidden number of infected and spreading persons. Of those positively tested around 20% will develop into a severe case. Although germany has quite a large number of ICU beds available, current guidelines are there to flatten the curve and spread the bulk of the severe cases over a longer time (but a lower number at any given time). That said, due to its federal structure central government has only limited powers to enforce any of the advise, it has to be put into action within any of the states individually.