I have a huge phobia of sickness, and currently share a flat with my boyfriend and our friend. Our friend rarely stays at the flat, however he stayed with his girlfriend on Friday night but me and my boyfriend were out all night and only spoke to them for fifteen mins. The next morning they left early and we didn't see them. They haven't been back to the flat all weekend, apart from today when our friend was in briefly whilst me and my boyfriend were out. However, he text my boyfriend saying him and his girlfriend got a sickness bug on Saturday and stayed at hers all weekend. We have now left the flat for the week until Sunday, so we still haven't come into direct contact with them since Friday night, only for fifteen minutes. I am so worried in case I get this sickness bug. Does anyone know the likeliness of this happening since I haven't seen them since Saturday and won't see them again until at least Sunday??