So when my girls get it (they are 4 1/2 and 2, so obviously I'm right by their side), they actually throw up only a couple times, and after that it's just heaving, with maybe a tiny bit coming up. How contagious is it when you're sitting next to someone who is just heaving??? I know if they're actually throwing stuff up the particles spray and you can ingest them by getting them in your mouth that way....but if nothing is coming up and they're just really going through the motions of vomiting with no actual vomit, is it still super contagious when you sit with them? Thanks!