Boyfriend's brother has an sv

This is my worst fear. My boyfriend told me his little brother has an sv. He said they aren't sharing a bathroom and he will be extra careful (my bf usually isn't germ conscious but he never gets sick). I'm still freaking out and its making me want to avoid my boyfriend for a while which makes me feel bad. I'm taking antibiotics for pneumonia right now so I feel more at risk. Edit: my boyfriend wants to hang out Friday. I'm scared he'll touch something with the virus on it and touch his mouth and then kiss me and I will get it.