I live in the outer suburbs of Stockholm and (normally) commute into town by train every day. Every year around midsummer (20 June), the trains start getting noticeably less crowded, as people start going on their summer holidays. Then it takes until late August before the rush-hour crowds are back to normal. Is seems an extraordinary coincidence that it was during this period that Covid-19 essentially petered out in Sweden. Since the beginning of September, the number of positive tests has been climbing again, more or less exponentially. The number of deaths is lagging behind, but there is a definite uptake the last couple of weeks. As usual, deaths seem to be going down during the last week because of lagging statistics. My guess is that the final number for friday 23 october will end around 7, and 30 October around 10 (but I hope I am wrong!). At least this seems to indicate that you do not need a full-blown lockdown to stamp out Covid-19 — "Swedish summer" is a sufficiently low level of activity!