Virtual is a different concept from Physical. Physical is related to Disease. 
you are likely to find Doorway in/at/on Building. you are likely to find Hall in/at/on Building. Hall is related to Walking. Walking is the opposite of Standing. 
Virtual <--DistinctFrom--> Physical <--RelatedTo--> Disease 
Doorway --AtLocation--> Building <--AtLocation-- Hall <--RelatedTo--> Walking <--Antonym--> Standing 