Thousands of people demonstrated across Germany on Saturday in the latest wave of protests against Covid-19 restrictions and vaccination requirements. In the south-western city of Freiburg, around 4,500 people joined a demonstration against a proposed vaccination mandate and other measures to contain the pandemic, police said. Organizers had expected about 7,000 participants. According to a police spokesperson, there were no incidents of note, although counter-demonstrators had tried to block the route of the march with bicycles. In Brandenburg an der Havel, a town west of Berlin, the police b…