Interesting that you should mention skiers from Europe, Radgirl. A couple of friends of ours went to Austria with their children during the school half term in February. Within a week of returning, both the adults were feeling pretty lousy. Temperature, sore throats and extreme fatigue. Covid was just a news report from China at the time so they never made a connection until fairly recently. Both have recovered well but neither of their children succumbed, although in close contact in the same household. Unless, they did and were asymptomatic? The whole family could be a fascinating case study.