diff --git a/cara/models.py b/cara/models.py
index ea7255c7..239cb2a2 100644
--- a/cara/models.py
+++ b/cara/models.py
@@ -483,7 +483,7 @@ Virus.types = {
     ),
     'SARS_CoV_2_Omicron': SARSCoV2(
         viral_load_in_sputum=1e9,
-        infectious_dose=50/4.334,
+        infectious_dose=50/4.9841,
     ),
 }