A shipment of the Sinovac coronavirus disease (COVID-19) vaccine, bearing the Uruguay flag, is transported on the tarmac after being unloaded from a LATAM Airlines plane after its arrival at Carrasco Airport in Montevideo, Uruguay February 25, 2021. REUTERS/Mariana Greif

A LATAM Airlines plane carrying a shipment of the Sinovac coronavirus disease (COVID-19) vaccine arrives at Carrasco Airport in Montevideo, Uruguay February 25, 2021. REUTERS/Mariana Greif

A shipment of the Sinovac coronavirus disease (COVID-19) vaccine, bearing the Uruguay flag, is unloaded from a LATAM Airlines plane after its arrival at Carrasco Airport in Montevideo, Uruguay February 25, 2021. REUTERS/Mariana Greif

A shipment of the Sinovac coronavirus disease (COVID-19) vaccine, bearing the Uruguay flag, is transported on the tarmac after being unloaded from a LATAM Airlines plane after its arrival at Carrasco Airport in Montevideo, Uruguay February 25, 2021. REUTERS/Mariana Greif

A shipment of the Sinovac coronavirus disease (COVID-19) vaccine, bearing the Uruguay flag, is transported on the tarmac after being unloaded from a LATAM Airlines plane after its arrival at Carrasco Airport in Montevideo, Uruguay February 25, 2021. REUTERS/Mariana Greif

A shipment of the Sinovac coronavirus disease (COVID-19) vaccine, bearing the Uruguay flag, is unloaded from a LATAM Airlines plane after its arrival at Carrasco Airport in Montevideo, Uruguay February 25, 2021. REUTERS/Mariana Greif REFILE - QUALITY REPEAT

A shipment of the Sinovac coronavirus disease (COVID-19) vaccine, bearing the Uruguay flag, is unloaded from a LATAM Airlines plane after its arrival at Carrasco Airport in Montevideo, Uruguay February 25, 2021. REUTERS/Mariana Greif REFILE - QUALITY REPEAT

A LATAM Airlines plane carrying a shipment of the Sinovac coronavirus disease (COVID-19) vaccine arrives at Carrasco Airport in Montevideo, Uruguay February 25, 2021. REUTERS/Mariana Greif

A LATAM Airlines plane carrying a shipment of the Sinovac coronavirus disease (COVID-19) vaccine arrives at Carrasco Airport in Montevideo, Uruguay February 25, 2021. REUTERS/Mariana Greif

Horse racing - Saudi Cup - King Abdulaziz Racetrack, Riyadh, Saudi Arabia - February 20, 2021 Jockey William Buick celebrates after winning the Saudi Arabian Airlines Riyadh Dirt Sprint riding Copano Kicking REUTERS/Ahmed Yosri

Horse racing - Saudi Cup - King Abdulaziz Racetrack, Riyadh, Saudi Arabia - February 20, 2021 Jockey William Buick celebrates after winning the Saudi Arabian Airlines Riyadh Dirt Sprint riding Copano Kicking REUTERS/Ahmed Yosri

Horse racing - Saudi Cup - King Abdulaziz Racetrack, Riyadh, Saudi Arabia - February 20, 2021 Jockey William Buick celebrates with a trophy after winning the Saudi Arabian Airlines Riyadh Dirt Sprint riding Copano Kicking REUTERS/Ahmed Yosri

An information sign realted to sniffer dogs trained to detect the coronavirus disease (COVID-19) is seen at an entrance to the American Airlines Arena before a Miami Heat game in MIami, Florida, U.S., February 5, 2021. REUTERS/Marco Bello

A sniffer dog trained to detect the coronavirus disease (COVID-19) scans people as they queue to enter the American Airlines Arena for a Miami Heat game in MIami, Florida, U.S., February 5, 2021. REUTERS/Marco Bello

A sniffer dog trained to detect the coronavirus disease (COVID-19) scans people as they queue to enter the American Airlines Arena for a Miami Heat game in MIami, Florida, U.S., February 5, 2021. REUTERS/Marco Bello

An information sign realted to sniffer dogs trained to detect the coronavirus disease (COVID-19) is seen at an entrance to the American Airlines Arena before a Miami Heat game in MIami, Florida, U.S., February 5, 2021. REUTERS/Marco Bello

Sniffer dogs trained to detect the coronavirus disease (COVID-19) scan people attending a Miami Heat game at the American Airlines Arena in MIami, Florida, U.S., February 5, 2021. REUTERS/Marco Bello

A sniffer dog trained to detect the coronavirus disease (COVID-19) scans people as they queue to enter the American Airlines Arena for a Miami Heat game in MIami, Florida, U.S., February 5, 2021. REUTERS/Marco Bello

A sniffer dog trained to detect the coronavirus disease (COVID-19) scans people as they queue to enter the American Airlines Arena for a Miami Heat game in MIami, Florida, U.S., February 5, 2021. REUTERS/Marco Bello

Sniffer dogs trained to detect the coronavirus disease (COVID-19) scan people attending a Miami Heat game at the American Airlines Arena in MIami, Florida, U.S., February 5, 2021. REUTERS/Marco Bello

A sniffer dog trained to detect the coronavirus disease (COVID-19) scans people as they queue to enter the American Airlines Arena for a Miami Heat game in MIami, Florida, U.S., February 5, 2021. REUTERS/Marco Bello

A sniffer dog trained to detect the coronavirus disease (COVID-19) scans people as they queue to enter the American Airlines Arena for a Miami Heat game in MIami, Florida, U.S., February 5, 2021. REUTERS/Marco Bello TPX IMAGES OF THE DAY

A sniffer dog trained to detect the coronavirus disease (COVID-19) scans people as they queue to enter the American Airlines Arena for a Miami Heat game in MIami, Florida, U.S., February 5, 2021. REUTERS/Marco Bello

A sniffer dog trained to detect the coronavirus disease (COVID-19) scans people as they queue to enter the American Airlines Arena for a Miami Heat game in MIami, Florida, U.S., February 5, 2021. REUTERS/Marco Bello

A sniffer dog trained to detect the coronavirus disease (COVID-19) scans people as they queue to enter the American Airlines Arena for a Miami Heat game in MIami, Florida, U.S., February 5, 2021. REUTERS/Marco Bello

A cardboard cutout of a Japan Airlines stewardess wearing a protective face mask is seen in a Terminal at Paris Charles de Gaulle airport in Roissy near Paris as France closed borders to travellers outside European Union due to restrictions against the spread of the coronavirus disease (COVID-19) in France, February 5, 2021. REUTERS/Gonzalo Fuentes

A cardboard cutout of a Japan Airlines stewardess wearing a protective face mask is seen in a Terminal at Paris Charles de Gaulle airport in Roissy near Paris as France closed borders to travellers outside European Union due to restrictions against the spread of the coronavirus disease (COVID-19) in France, February 5, 2021. REUTERS/Gonzalo Fuentes

Staff members wearing protective gear following the coronavirus disease (COVID-19) outbreak stand near China Eastern Airlines check-in machines at Shanghai Hongqiao International Airport as the Spring Festival travel season begins ahead of the Chinese Lunar New Year, in Shanghai, China January 28, 2021. REUTERS/Aly Song

A member of the Azul airline crew kisses "Ze Gotinha", the mascot of SUS (Unique Health System), after the arrival ceremony of the doses of AstraZeneca/Oxford vaccines against the coronavirus disease (COVID-19) from India, at Galeao Air Base in Rio de Janeiro, Brazil January 22, 2021. REUTERS/Ricardo Moraes

Scoot, Jetstar and Singapore Airlines planes sit on the tarmac at Singapore's Changi Airport, Singapore January 18, 2021. REUTERS/Edgar Su

How the Indonesian airline relied on an ageing fleet

A Singapore Airlines plane prepares for landing in Singapore January 14, 2021. REUTERS/Edgar Su

UPDATE One extra operational flight removed Indonesia’s Sriwijaya Air, used a strategy of acquiring old planes at cheap prices. The mid-market airline was thrust into the spotlight when a nearly 27-year old Boeing Co 737-500 crashed into the Java Sea on January 9, 2021.

Emirates airliners are seen on the tarmac in a general view of Dubai International Airport in Dubai, United Arab Emirates January 13, 2021. Picture taken through a window. REUTERS/Abdel Hadi Ramahi

Emirates airliners are seen on the tarmac in a general view of Dubai International Airport in Dubai, United Arab Emirates January 13, 2021. Picture taken through a window. REUTERS/Abdel Hadi Ramahi

Airliners are seen on the tarmac in a general view of Dubai International Airport in Dubai, United Arab Emirates January 13, 2021. Picture taken through a window. REUTERS/Abdel Hadi Ramahi

Emirates airliners are seen on the tarmac in a general view of Dubai International Airport in Dubai, United Arab Emirates January 13, 2021. Picture taken through a window. REUTERS/Abdel Hadi Ramahi

Emirates Airline President Tim Clark gestures as he speaks during an interview with Reuters in Dubai, United Arab Emirates, January 13, 2021. REUTERS/Abdel Hadi Ramahi

Emirates Airline President Tim Clark gestures as he speaks during an interview with Reuters in Dubai, United Arab Emirates, January 13, 2021. REUTERS/Abdel Hadi Ramahi

People welcome their relatives who arrived from Doha, at King Khalid International Airport in Riyadh, Saudi Arabia January 11, 2021. REUTERS/Ahmed Yosri

People welcome their relatives who arrived from Doha, at King Khalid International Airport in Riyadh, Saudi Arabia January 11, 2021. REUTERS/Ahmed Yosri

A woman hugs her relative who arrived from Doha, at King Khalid International Airport in Riyadh, Saudi Arabia January 11, 2021. REUTERS/Ahmed Yosri

A man carries flowers as he waits to welcome his relatives who arrived from Doha, at King Khalid International Airport in Riyadh, Saudi Arabia January 11, 2021. REUTERS/Ahmed Yosri

People wait to welcome their relatives who arrived from Doha, at King Khalid International Airport in Riyadh, Saudi Arabia January 11, 2021. REUTERS/Ahmed Yosri TPX IMAGES OF THE DAY

A man welcomes his relative who arrived from Doha, at King Khalid International Airport in Riyadh, Saudi Arabia January 11, 2021. REUTERS/Ahmed Yosri

A man carries flowers as he waits to see his relatives who arrived from Doha, at King Khalid International Airport in Riyadh, Saudi Arabia January 11, 2021. REUTERS/Ahmed Yosri

A man reacts as he waits to see his relatives who arrived from Doha, at King Khalid International Airport in Riyadh, Saudi Arabia January 11, 2021. REUTERS/Ahmed Yosri

A man kisses the hand of his relative who arrived from Doha, at King Khalid International Airport in Riyadh, Saudi Arabia January 11, 2021. REUTERS/Ahmed Yosri

A man hugs his relative who arrived from Doha, at King Khalid International Airport in Riyadh, Saudi Arabia January 11, 2021. REUTERS/Ahmed Yosri

People welcome their relatives who arrived from Doha, at King Khalid International Airport in Riyadh, Saudi Arabia January 11, 2021. REUTERS/Ahmed Yosri

A woman hugs her relative who arrived from Doha, at King Khalid International Airport in Riyadh, Saudi Arabia January 11, 2021. REUTERS/Ahmed Yosri

A Qatar Airways plane lands at the King Khalid International Airport, in Riyadh Saudi Arabia January 11, 2021. REUTERS/Ahmed Yosri

A Qatar Airways plane lands at the King Khalid International Airport, in Riyadh Saudi Arabia January 11, 2021. REUTERS/Ahmed Yosri

A Qatar Airways plane takes off at Hamad International Airport, as the country resumes international flights to Saudi Arabia, in Doha, Qatar January 11, 2021. REUTERS/Ibraheem Al Omari

A member of Qatar airways crew stands in front of flight information display at Hamad International Airport, as the country resumes international flights to Saudi Arabia, in Doha, Qatar January 11, 2021. REUTERS/Ibraheem Al Omari

Passengers wait at Hamad International Airport, as the country resumes international flights to Saudi Arabia, in Doha, Qatar January 11, 2021. REUTERS/Ibraheem Al Omari

A passenger sits in a wheelchair at Hamad International Airport, as the country resumes international flights to Saudi Arabia, in Doha, Qatar January 11, 2021. REUTERS/Ibraheem Al Omari

Passengers queue to check-in at Hamad International Airport, as the country resumes international flights to Saudi Arabia, in Doha, Qatar January 11, 2021. REUTERS/Ibraheem Al Omari

Passengers arrive to check-in at Hamad International Airport, as the country resumes international flights to Saudi Arabia, in Doha, Qatar January 11, 2021. REUTERS/Ibraheem Al Omari

A passenger arrives to check-in at Hamad International Airport, as the country resumes international flights to Saudi Arabia, in Doha, Qatar January 11, 2021. REUTERS/Ibraheem Al Omari