and therefore cannot access bars and restaurants, so they would be restricted in their movements, especially going out, and that is what a lot of people are protesting about, the possibility of having separate measures for the unvaccinated. thousands of croatians have also taken to the streetsof the capital, zagreb, in the biggest gathering in the country against covid restrictions and mandatory vaccine certificates, since the beginning of the pandemic. from monday, only people with covid passports can enter government and public buildings in croatia. the world health organisation has called for an urgent tightening of measures across europe, warning that half a million more deaths could be recorded by march, unless urgent action is taken. the un body says, at the moment, one person is dying from the virus in europe every 15 to 20 minutes. dr hans kluge, the who s regional director for europe, spoke to the bbc earlier.