Europe is struggling with the "Delta" variant of the coronavirus and as we already going through summer with a relatively low vaccination rate, uncertainty is beginning to spread for the coming weeks. Already, travel restrictions are steadily increasing, countries are taking measures to boost vaccinations to prevent the worst, and finally there are high concerns about mobility and over-concentration due to the Euro. Although analysts estimate that earnings per share for European airline companies will improve, the relevant index has been moving downwards. If it continues to move downwards, then the sector should expect reviews from analysts.