Sure, there is plenty of travel between China and Africa, but maybe the proportion of the population that travels internationally is much smaller than in Europe

Sure, there is plenty of travel between China and Africa, but maybe the proportion of the population that travels internationally is much smaller than in Europe or the US? We're seeing how Brazil lagged, but is now rapidly increasing the number of cases; couldn't it just be that on average people travel less, are less urbanized, and so it took longer to get the epidemic going?