From da1bf183375d5f2537fbb096f165bd72f35d4125 Mon Sep 17 00:00:00 2001
From: "David A. Madore" <david+git@madore.org>
Date: Thu, 5 Mar 2020 09:58:15 +0100
Subject: Link to CDC's Principles of Epidemiology.

---
 covid19-links.md | 10 ++++++++++
 1 file changed, 10 insertions(+)

(limited to 'covid19-links.md')

diff --git a/covid19-links.md b/covid19-links.md
index d7bdd89..19a1be7 100644
--- a/covid19-links.md
+++ b/covid19-links.md
@@ -137,3 +137,13 @@
   \[[mirror](https://github.com/cmrivers/ncov/blob/master/COVID-19.pdf)\]
   detailing breakdown of cases and statistics up to 2020-02-11 (72 314
   cases).
+
+## Not Covid-19 specific but still relevant ##
+
+* Definition of [morbidity frequency
+  measures](https://www.cdc.gov/csels/dsepd/ss1978/lesson3/section2.html)
+  and [mortality frequency
+  measures](https://www.cdc.gov/csels/dsepd/ss1978/lesson3/section3.html)
+  from (online version of) the CDC's book *Principles of Epidemiology
+  in Public Health Practice*: explains definitions of “attack rate”,
+  “secondary attack rate”, “case-fatality rate”, etc.
-- 
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