Israel will ban passenger flights in and out of the country from Monday for a week as it seeks to stop the spread of new coronavirus variants. "Other than rare exceptions, we are closing the sky hermetically to prevent the entry of the virus variants and also to ensure that we progress quickly with our vaccination campaign," said Benjamin Netanuahu, the Israeli prime minister. It came as a study in Israel reported a 60 per cent drop in over-60s being hospitalised with coronavirus three weeks after being vaccinated, in the latest sign that the jabs are effective. According to Maccabi, an Israeli healthcare provider, there was a significant decrease in hospitalisations from day 23 onwards, which was two days after patients received their second jab. Also on Sunday, Israel expanded its rapid vaccination drive to include 16-18 year-olds in an effort to get them back in schools to take their winter examinations. The winter matriculation certificate is a significant part of university and military admissions. At least one dose has been administered to around a quarter of Israel’s 9 million-strong population. The vaccine is generally available to over 40s or, with parental permission, those aged between 16 and 18. Israel struck a deal with Pfizer at the beginning of January that allowed them to expedite delivery of the vaccine, in return for sharing extensive data on their vaccination campaign with the rest of the world. Yuli Edelstein, the Israeli health minister, told The Andrew Marr Show on Sunday that the data from their vaccination programme suggests a first dose offered around 30 per cent protection from coronavirus.