The way I see it is that since cargo flights are not affected and thus goods can continue to be exported/imported I don't think the economy would suffer that much as long as there is freedom to travel within your own country. In the vast majority of countries (there may be some exceptions I concede) the leisure industry would recover quite rapidly through domestic as opposed to international tourism. This would allow more time (i.e. more than 6 months) for a full recovery.