Its spread like any other type flu,, by sneezing coughing , touching when tiny droplets are exposed into the air and surfaces.By any one who has been exposed to the virus,,,Touch by flush handles doors remotes tables, computers so on and so on.....
This is aka H1N1This is NOT gotten by eating any type pork.
Its best to keep your hands clean away from the face(nose, mouth or eyes),wash the hands often use hand sanditizer,try not to use public facilities, wash all fruits and veggies well, stay away from crowds, close proximity with others heightens chances of contacting this type flu(virus). Don't share foods, drinks, eating utensils.
Can get a vaccination for the SF after you get infected this only slows the progresstion down.