Update 2021-01-21-unpack-cfr.Rmd

minor fix to teaser

Author: zackchase

content/blog/2021-01-21-unpack-cfr.Rmd

@@ -16,7 +16,7 @@ heroImageThumb: /blog/images/unpack-cfr-thumb.jpg
 summary: |
   Since the pandemic started, case fatality has plummeted. 
   But how much can we attribute this drop to treatment improvements 
-  versus, increased testing, greater numbers of young patients, etc.?
+  versus increased testing, younger patients, etc.?
 acknowledgements: |
   We thank Roni Rosenfeld, Cosma Shalizi, and Marc Lipsitch 
   for their detailed feedback throughout this analysis