So Arteta has caught it. So what? There is little chance of him having anything other than a mild flu. Rather than panic, let's just look at the number of deaths in this country (10). If we're going to cancel everything, put thousands of jobs at risk etc every time there's a medical scare, however real the consequences for some, then let's take this logic to its conclusion and shut down all roads and ban smoking for starters.
Jury's still out on whether it can cause lasting damage to the lungs last I heard. If the whole prem gets infected leading to 1 or 2 serious cases would still be ridiculously negligent by the league.