I think I need to gove some perspective on the 50/100k infections per week

Firstly, it is a political number set forth when Germany was moving from a nation/state wide approach to more localised measures. No sientific basis, roughly equal to the highest numbers Germany recorded end of March/early April and though to be way to high by most. Berlin e.g. has lowered it's threshold 30/100k/week with alarms starting at 20/100k/week.
Secondly, as things are, this has then been taken over by others countries (like so often, you need one to start

).
As of today, of the major European countries, only Sweden is above that at 76, Germany at 4 and the previously mentioned Netherlands are at 3, like Indonesia. Singapore is at 22.
Which leads us to opening travel (remember, Germany only has a travel advisory, to a travel ban. If I can get there I can go to any country in the world, even if war and plague are raging there). And it becomes again highly political and very unfair.
E.g., the EU might decide that it is save to travel or transit through Singapore but still would advise against travel to Indonesia. The reasoning for that would run along the lines that Singapore can provide better health care to sick travellers and that the current cases in Singapore are more confined to the workers dormitories. Sounds unfair with Indonesia having lower rates of infection? Definately, but that's politics

.
Hope that helps a little to make things clearer and gives an insight into how Europe will re-start world-wide travel.