Green Blob

Infection (Kansen) directed by Masayuki Ochiai, takes place in an empty and understaffed hospital in Japan. When an ambulance drops off a man carrying a deadly virus, the doctors decide to keep the staff overnight in order to figure out what's ailing the patient. Little by little, the hospital's personnel begins to show very strange behavior.
Here you'll find two clips showing some pretty gross stuff. Even though the movie clearly doesn't have state of the art special affects, all the green blob emanating from the characters' orifices adds to the gag factor.