differences in vaccines. you've got high levels of non—vaccine uptake in some populations in some european countries. in the uk high infection rates also helped to build up immunity. now, the push to get boosterjabs in continues. as a fourth wave crashes across the continent, countries are struggling to ease pressure on the health services and the streets. anna holligan, bbc news, in the hague. journalist stephanie van der berg is in the hague and told us more about what's driving the protests there. well, the main point of the demonstration is not that they have a current lockdown like in the netherlands, where bars, restaurants and clubs and other public spaces are closed at 8:00pm, but the government announced that if that doesn't work, bringing down the record numbers of infections we are seeing in the netherlands, that they might have to look at a system were unvaccinated people no longer will be able to have a green check in the corona app and therefore cannot access bars and restaurants, so they would be restricted in their movements, especially going out,