If someone has been in contact with someone with mumps, who should they avoid and until when??

[Thankyouandgoodnight]

and....is Baby B at risk?

Family A have toddler and baby.

Family B have toddler and baby.

Mump person spent a day cuddling baby A and then discovered a week later that they had mumps (today). So poor baby A is definitely at risk.

In that week period, Mum A also cuddled toddler and Baby B.

Mummy A is wondering if she should go in to quarantine and panicking about Baby B.

Does anyone know what the advice is?

don't know, sorry, got a bit confused about who cuddled what

mumps isn't very serious though?