So as an Austrian, I think that's planned #DemonstrationBan in Berlin is questionable:
#FreedomOfAssembly is one of the highest goods in democracy and restrictions quickly turn democracy itself into question.
https://www.channelnewsasia.com/news/world/berlin-bans-protest-against-covid-19-curbs-13055762

And that's exactly what it is #ConstitutionalLawyers from the mainstream pretty much agree that ##DemonstrationBan in Austria and the dissolved demo in Vienna is unconstitutional - whether there ist #Coronavirus or not.
https://www.reuters.com/article/us-health-coronavirus-austria-protest/banned-vienna-protest-against-lockdown-draws-200-idUSKCN2262VY

German #ConstitutionalCourt tilts #DemonstrationBan in Stuttgart. Right to demonstrate also in the name of the #Coronavirus must not be levered out. Fundamental rights apply.
https://www.aljazeera.com/news/2020/04/germans-protest-pandemic-court-rules-200416163510305.html