From f9215cbf4d573c1d785e463572bde6f0965b77c7 Mon Sep 17 00:00:00 2001
From: "David A. Madore" <david+git@madore.org>
Date: Sat, 25 Apr 2020 20:06:13 +0200
Subject: Link to two more of my Twitter threads.

---
 covid19-links.md | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/covid19-links.md b/covid19-links.md
index c59cb90..bdeb6aa 100644
--- a/covid19-links.md
+++ b/covid19-links.md
@@ -446,6 +446,13 @@
 
 ## My own explanatory threads on Twitter ##
 
+* [On evidence or lack of evidence that Covid-19 infections confer
+  immunity](https://threadreaderapp.com/thread/1254069215264419841.html)
+  and [an epidemiological estimation of the order of magnitude of
+  immunity conferred by
+  HCoVs](https://threadreaderapp.com/thread/1254105660440092674.html)
+  (2020-04-25).
+
 * [Why the variance of infectious contacts received matters more than
   the variance of infectious contacts
   made](https://threadreaderapp.com/thread/1252581933835575297.html)
-- 
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