Ah, no if your mum has a strain that is not covered by the vac you're not ok. Even if she does have the strain covered buy the vac it's not 100% effective she she needs to be sensible and stay away. You sound so frustrated I think after she's been treated with the antibiotics for a certain time (can't remember off hand how long sorry) that she'll be ok to not spread it any more. Maybe you can call your doctors office or health first line and ask how long after antiBs start are you safe to not be contagious.