translation.en: This is the most important slide that I've ever seen in public health, [Sovereigns killed by smallpox] because it shows you to be the richest and the strongest, and to be kings and queens of the world, did not protect you from dying of smallpox.
translation.zh: 这是我看到过的关于公共卫生的最重要一张幻灯片 它告诉你，即使你再有钱、再健壮 即使你是君王 也不能免于天花之害