Of course you didn't read the link I gave you. It's only a hypothetical guess on your part that doctors didn't wash their hands in between patience, the evidence in the link suggest otherwise, hygiene was always viewed as a defense mechanism, basically the only one they had back in those times. Along with your analogy of not vaccines just talking about medication....the link discusses that also, the voo-doo remedies, the snake oil salesmen type jive....actually medicine and vaccines proven to work didn't occur until the identification and isolation of the germs causing them, which goes back to my comment that this is how we know that chart can be disproved....as the chart indicates dates that there was no scientific way to identify the exact source why a lot of people died back then. You can argue for/against vaccines all day long, that isn't the issue in this chart debates credibility, the issue is there was no scientific way this chart can be held to be true or accurate during certain time frames on it.