Quite engaging but  there seems to be a weak plot in this film.  No clear explanation what caused the virus nor was there any indication of a resolution to the problem.  Almost all the time, the girl was just seen either walking or running to some place.  While cinematography is quite okay  it seems the story was just going around in circles. The last scene with the girl taking a rest in the woods is no reassurance that she is safe from any harm or illness thus the title is in itself quite questionable for the viewers.