New data compiled by IATA, or the International Air Transport Association, shows that both domestic and international air travel demand has dropped by as much as 40% in the wake of the novel coronavirus outbreak in central China.

The report, which was released late last week, tracks demand around the Lunar New Year holiday, a traditionally busy time for air travel in the region. As of January 31st, seven days after the holiday, domestic and international air travel demand is down 40% from 2019 to 2020.

According to the report, “passenger volumes declined sharply following the closure of Wuhan Airport and World Health Organization’s declaration of the coronavirus as an international public health emergency.”