Can swine flu virus be present on a surface which is actually not touched by an infected person but who also yet has another surface?

It is possible for the swine flu virus to be present on a surface that has not been directly touched by an infected person. This can occur through indirect contact, such as when a person touches a surface that has been contaminated by the virus and then touches their own face. The virus can also be spread through the air, so it is possible for it to land on a surface even if no one has directly touched it.

Additionally, the virus can survive on surfaces for up to 48 hours, so it is possible for it to be present on a surface even if the infected person has not been in the area for some time. It is important to practice good hygiene, such as washing your hands frequently and avoiding touching your face, to reduce your risk of infection.