Yellow Fever - Potential Epidemic

The Economist this week includes a leader article on the threat of yellow fever.  Though yellow fever is endemic in Africa, it is surprisingly less common in Asia.  That the recent yellow fever outbreak in Angola may spread to China, through movements of Chinese workers or expatriates, is concerning.  The article included an interesting map that I would like to explore further, cited as Source: Kraemer et al. eLife, 2015.  The follow up article in the same issue also mentions the Philadelphia outbreak of 1793.