The Czech government installed today a system for classifying countries according to Corona risk, starting from June 15th. Safe countries are given the color green. Czech citizens can travel to and return from these countries without restrictions. It will also be possible to travel to the Czech Republic from these countries without restrictions.
How lucky: Germany is green!
Countries marked in orange are a less safe, so foreigners still need a negative corona test to enter the Czech Republic from there. Traveling back from the countries marked in red, even Czechs will need a negative Corona test