Karwoman New cases still only a few hundred in Germany, but there are small hotspots:
that church in Hessen, some care homes for the elderly, 2 or 3 meat processing plants, a DPD depot
So long as these remain isolated and the total number of cases doesn't shoot up, local lockdowns or closures should suffice
A 2nd wave would be exponential growth, so new cases shooting up into several thousand per day again.
No sign of that so far in any country that has re-opened^
but it's only been a month, early days yet