Figure - PMC

Skip to main content

An official website of the United States government

Here's how you know

Here's how you know

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you've safely connected to the .gov website. Share sensitive information only on official, secure websites.

View full-text article in PMC

. 2023 Apr 14;11(5):e791–e795. doi: 10.1016/S2214-109X(23)00129-8

Search in PMC
Search in PubMed
View in NLM Catalog
Add to search

© 2023 The Author(s). Published by Elsevier Ltd. This is an Open Access article under the CC BY 4.0 license

Since January 2020 Elsevier has created a COVID-19 resource centre with free information in English and Mandarin on the novel coronavirus COVID-19. The COVID-19 resource centre is hosted on Elsevier Connect, the company's public news and information website. Elsevier hereby grants permission to make all its COVID-19-related research that is available on the COVID-19 resource centre - including this research content - immediately available in PubMed Central and other publicly funded repositories, such as the WHO COVID database with rights for unrestricted research re-use and analyses in any form or by any means with acknowledgement of the original source. These permissions are granted for free by Elsevier for as long as the COVID-19 resource centre remains active.

PMC Copyright notice

Spread of SARS-CoV-2 variants across five continents and flight routes from the busiest ten international airports in 2021

The top ten busiest airports worldwide in 2021 were published by the Airports Council International. The ranking was based on international passenger traffic.⁸ Flight route data were obtained from OpenFlights. Data for SARS-CoV-2 variants were obtained from GISAID,⁹ including variants of concern (alpha [B.1.1.7], beta [B.1.351], gamma [P.1], delta [B.1.617.2 and AY], and omicron [B.1.1.529 and BA.]), previous variants of interest (lambda [C.37] and mu [B.1.621 and B.1.621.1]), and variants under monitoring (GH/490R [B.1.640]). DXB=Dubai International Airport, Dubai, United Arab Emirates. ISL=Atatürk International Airport, Istanbul, Türkiye. AMS=Amsterdam Schipol Airport, Amsterdam, Netherlands. FRA=Frankfurt Airport, Frankfurt, Germany. CDG=Paris Charles de Gaulle Airport, Paris, France. DOH=Hamad International Airport, Doha, Qatar. LHR=London Heathrow, London, UK. AYT=Antalya Airport, Antalya, Türkiye. MAD=Adolfo Suárez Madrid–Barajas Airport, Madrid, Spain. CUN=Cancun International Airport, Cancun, Mexico.