Disease is going to be a major problem in the 21st century in general. Antibiotic resistance, diseases that "jump" from wildlife to humans, and even, perhaps, bioweapons, all seem to be major threats. Those interested in reading more might check out:<p>* Laurie Garrett's <i>The Coming Plague</i> <a href="http://amzn.to/2c9Vsoh" rel="nofollow">http://amzn.to/2c9Vsoh</a><p>* David Quammen's <i>Spillover</i> <a href="http://amzn.to/2cm4ONj" rel="nofollow">http://amzn.to/2cm4ONj</a><p>Garrett's book is particularly good. I've not read a better summary of the political, economic, and social power disease will have over the next century.