Why is the death rate higher in Mexico? Maybe it isn't:
Of the 110 million people in Mexico, 1,600 cases have been reported, with about 100 deaths–suggesting a mortality rate of 6 percent. This is almost certainly bad math, as the total case count almost certainly ignores thousands or tens of thousands of other cases that have taken milder courses like those in the United States. It's perfectly conceivable Mexico has actually had 10,000 or 100,000 cases–or even 1 million cases. If so, then the kill rate would be not 6 percent but 0.1 percent (given 10,000 cases) or 0.01 percent (given 100,000 cases). If it's 1 million cases (quite possible if this thing really spreads easily) then the mortality rate is just 1 in 10,000. Meanwhile, because the United States is on high alert–and can take special note of people with recent travel to Mexico–it is probably picking up a fairly high percentage of its cases, including milder instances that would have gone unnoticed in Mexico a few weeks ago.
…For one thing, it's also possible that Mexico is missing, undercounting, or badly underreporting deaths. But if this virus really does spread rapidly, its kill rate is fairly low; and if its kill rate is anywhere near as high as the 100-out-of-1,600 suggests, then it doesn't spread very easily.
Here is the full article.
Addendum: Have the first U.S. deaths arrived?