Update app.py

app.py

@@ -154,7 +154,8 @@ with ui.navset_card_tab(id="tab"):
         ui.panel_title("Can we create sub-specie based on 2d representation? How does their 2D representation vary?")
         with ui.layout_columns():
             with ui.card():
-                ui.input_selectize("virus_selector_2", "Select your viruses:", virus_new, multiple=False, selected=None)
+                ui.input_selectize("virus_selector_2", "Select your viruses:", virus_new, multiple=False, 
+                                   selected='Human mastadenovirus B')
     
                 ui.input_selectize(
                     "plot_type_distro_sub",