Smallpox outbreak of Sydney’s past

Chris Warren, ‘Okham’s Razor’, ABC Radio National, 14 April 2014: https://www.abc.net.au/radionational/programs/ockhamsrazor/smallpox-outbreak-of-sydney27s-past/5375394

(The original post from 17 April 2014 is no longer available. The above link replaces that post.)