How does the stomach virus spread? I been 4 ft away from a infected person. But no contact with vomit. should I be fine?

It depends on what type of virus it is but you should be fine as long  as you didn't make contact with them like using the same spoons or forks and stuff like that if its one of those viruses but some of them can be air born

Explanation:

between the two muscle layers is the myenteric or auerbach's plexus, which controls peristalsis. in the colon, the muscularis externa is much thicker because the feces are large and heavy, requiring more force to push along. the stomach has a third layer of muscularis externa: the inner oblique layer.