Update app.py

app.py

@@ -1244,7 +1244,7 @@ def hook_abnorm(plot, element):
 
 
 def add_norm_curves(column_changer,year_slider):
-    if column_changer == 'Referral Rate(%)' or == 'hrHPV/ASC-US rate (%)' or == 'hrHPV Prevalence (%)':
+    if column_changer == 'Referral Rate(%)' or column_changer == 'hrHPV/ASC-US rate (%)' or column_changer == 'hrHPV Prevalence (%)':
         return None
     else:    
         mu= med_ref_distribution.iloc[-2][column_changer]