By Krisztina Than and Nikolaj Skydsgaard BUDAPEST (Reuters) – Coronavirus infections are hitting record levels in many countries across Europe as winter takes hold, prompting a call for action from the World Health Organization which described the new wave as a “grave concern”. Soaring numbers of cases, especially in Eastern Europe, have prompted debate on whether to reintroduce curbs on movement before the Christmas holiday season and on how to persuade more people to get vaccinated. That conversation comes as some countries in Asia, with the notable exception of China, reopen their tourism s…