So its a monday today,One of my friends and co worker fell ill with the bug,and was sick most of the morning,of course i havent been around her since Friday,but im worried if she mightve caught it at work? Because if so i might and I SO DONT WANT THAT (the fact of why im on here,emetophobia wahh...)
How long are people contagious,and can i catch it from her when she comes back?

Help me! i am sooooo paranoid!