A Hybrid Model for the Impact of COVID-19 Prevention Measures on the Sustainable Development of the Aviation System

<div>Medical costs when none of the passenger is wearing masks. Blue, orange, and yellow represent different airport facilities, respectively. The solid, hollow, and slash of the histogram represent different social distances, respectively.</div>

Mathematical Problems in Engineering

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Figure 9

Figure 9: A Hybrid Model for the Impact of COVID-19 Prevention Measures on the Sustainable Development of the Aviation System 