COVID-19 undeniably reached Europe on an aeroplane. While the epidemic is globalised, the sanitary conditions at the destinations of trans-continental flights will continue to be vary enormously. Until such time as the eagerly awaited vaccine has been administered on a broad scale, European pensioners, the stalwarts of winter sun tourism outside school holidays, will think twice before buying an airline ticket: epidemiologists have shown them to be the highest-risk age group.
Is the...