It is a zombie movie in which a group of people are doing a road trip in a van. They stop at a western village. At a certain point, a man in the group gets bitten and ask the others to leave him before he attacks them. The main actor is a woman left alone at the end.
I bet my friend I could find this movie, but it turns out being more complicated than I thought. The movie is probably from the 1990s/2000s, since my friend watched it a while ago.
It was like spreading a virus before turning into zombies. They got fevers then the face turned white.
It was a scary movie, not a funny one.