“…The arrows are pointed to the right and down, with log(AT) positively leading log(Pandemic) . In this sub-period, air traffic slowly recovers after the lockdown due to cargo ( Wood and Knowles, 2022 ) and medical or repatriation flights ( Karim et al, 2020 ). The positive co-movement allows one to suspect air transportation as a potentially spread environment, possibly because of weaknesses in preventive pandemic procedures during traffic operations for both employees and passengers.…”