Total lack of scientific approach
The closing down of European air space and airports is a dreadful knee-jerk reaction brought upon us all by politicians. There is no proper collection and processing of scientific data to support the measures.
Are air samples collected from the allegedly contaminated FLs at hourly (or, at least, regular) intervals? Obviously not, or we would have this data being released on an ongoing basis.
The people inflicting this chaos on us are, in fact, flying blind with all instruments turned off. Dreadful, absolutely dreadful.