Open disease data. covid-19 stats. REST API. Free to use. Sources information from multiple places. Kept as up to date as possible. JSON output.
Bonita, Ruth, Beaglehole, Robert, Kjellström, Tord & World Health Organization. (2006). Basic epidemiology, 2nd ed. World Health Organization.
Teacher's guide for basic epidemiology, WHO document no. WHO/EHG/94.10
9783456852546 (German, 2013)
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