From 307651ab24877b31aba54cc2741c318bf7b705e4 Mon Sep 17 00:00:00 2001
From: Galen Guyer <galen@galenguyer.com>
Date: Sat, 16 Jan 2021 13:31:27 -0500
Subject: Patch failure for one-week current semester

---
 src/MainPage.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/MainPage.js b/src/MainPage.js
index ae9c5a9..8e8bc22 100644
--- a/src/MainPage.js
+++ b/src/MainPage.js
@@ -6,7 +6,7 @@ const MainPage = (props) => {
     const data = props.data;
     const latest = data[data.length - 1];
     const prior = data[data.length - (1 + props.timeDifference)];
-    const priorPrior = data[data.length - (1 + props.timeDifference * 2)];
+    const priorPrior = data[Math.max(0, data.length - (1 + props.timeDifference * 2))];
 
     const positiveTestRate = Math.max(
         0,
-- 
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