What are some financial consequences countries may face once?
One consideration is the cost of controlling the outbreak, which may include hospitals, ambulances, personnel, medicines, canvassing of neighborhoods, control of vectors (like mosquitoes). Another might be loss of tourist revenue. For instance, Miami Florida lost big bucks in tourism with the Zika outbreak last year, and there were only a relatively few cases in a relatively small area. Here is but one article I found about this situation : Bit by Zika, Miami-Dade hotel taxes in first slump since Great Recession