That's controlled.
---------- Post added at 16:32 ---------- Previous post was at 16:31 ----------
Quote:
Originally Posted by Paul
Of course it has, throughout the entire human history.
Vaccines have only existed for a very small period of time.
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I should have added 'deliberate' uncontrolled. In the past yes - diseases have killed enough people that those who remain are immune. I'm not sure that's a good policy outcome though...