Captions:
Table 1: The list of countries and corresponding airports
included in the present study to simulate the flight connections and
screen the passengers. The airports abbreviations are the IATA
(International Air Transport Association) codes. WUH: Wuhan, PEK:
Beijing Capital International Airport, CAN: Guangzhou Baiyun
International Airport, CDG: Paris-Charles De Gaulle, ORY: Orly Airport,
FRA: Frankfurt Airport, MUC: Munich International Airport, FCO: Leonardo
da Vinci International Airport, MXP: Malpensa Airport Milan, DXB: Dubai
International Airport, SHJ: Sharjah International Airport, AUH: Abu
Dhabi International Airport, DOH: Hamad International Airport Doha, KWI:
Kuwait International Airport, MCT: Muscat International Airport, IKA:
Imam Khomeini International Airport Tehran, MAD: Madrid-Barajas Adolfo
Suárez Airport, SIN: Singapore Changi Airport, BKK: Suvarnabhumi Airport
Bangkok, HKT: Phuket International Airport, LHR: Heathrow Airport
London, JFK: John F. Kennedy International Airport New York, ORD: O’Hare
International Airport, Chicago, and SFO: San Francisco International
Airport.
Figure 1: Global map indicating the location of 24 different
airports from 10 different countries considered in this study. The size
of the circles represents the importation risk index. The political
boundaries are for the representation only as provided by the original
data source and authors not necessarily agree with the same.
Figure 2: Chart representing the importation risk index for
various countries derived between 4th March 2020 and
24th March 2020 by taking an account of 24
international airports in respective countries.
Figure 3: The scatter plot between the actual number of cases
in India imported from ten countries (corresponding airports are listed
in Tab. 1) and derived importation risk index. The inset figure is
similar to the main figure except data point pertaining to middle east
is excluded.
Acknowledgement: Authors gratefully acknowledge the support and
thoughtful insights from selected faculty members from Dept. of Civil
Engineering at IIT Madras. SSG is thankful to Nabha S. Gunthe and Nupura
S. Gunthe for constant encouragement and stimulating discussions.
Author contribution: SSG conceived the idea. SSP carried out the
simulations along with collecting and analyzing the data. SSP and SSG
performed the interpretation of the data. SSG wrote the manuscript with
input from SSP.
Competing interest: Authors declare no competing interest.
Conflict of interest: Authors have no conflict of interest regarding
this work.
Funding: No funding was available/used for this study.
Data availability: The data that support the findings of this study are
available from the corresponding author upon reasonable request.
Ethical statement: Ethical statement is not applicable for this study.