ACI Europe highlighted in a statement that between weeks 47 and 49 of 2021 (from 22 November to 12 December), passenger air traffic in Europe decreased by 20%, considering this decrease an “immediate and substantial” impact of the variant Omicron.

South Africa informed WHO of the appearance of the variant on 24 November.

The 20% reduction is a preliminary estimate based on data from 40 airports in 25 European countries, and includes both large airports and small regional airfields.