Hey guys, some advice would be greatly appreciated!

So I just got back home to my parents house after having been away at school. 2 weeks ago my parents caught an awful s*v* at my Grandmother's retirement home. My Dad just had d* and my mom had d* and v*. My brother also had d* that he says he caught from my Dad. So they started to get sick on Monday night, 2 weeks ago from this past Monday. It has been 2 weeks and 2 days since they started getting sick, and it has been exactly 2 weeks and 1 day since anyone has v*. I believe their d* was all gone by 2 weeks ago today. Do you think there is a possibility that the s*v* is still lingering on surfaces in my house?? I have my own bathroom and no one has used it, but I am a little worried about the kitchen/doorknobs/light switches/etc. I am taking precautions (using wet ones, washing hands, not touching face), but am just not sure how long I need to do these things before I am actually safe. Any advice? What do you guys think??

THANK YOU!