DS has chicken pox: how long should he be quarantined?

[gotogirl]

DS has chicken pox, the spots appeared this morning. Problem is, my Dsister is due to visit next Monday and she is pregnant so should I cancel her visit? I have read that he will remain contagious for 4 days after the appearance of the last spot but is this right? And if he has no contact with her, but I do see her alone, would this stlll present a risk to her?

As I understand it, your DS will be contagious until the last spot has crusted over. Both my DDs had it, and it takes about 5 days in total for the crusting to come and then a few more days before they drop off. I would ring your sister and let her know, but in 4-5 days they should all be crusted over. So you should be OK, but just let her know it might be a last minute cancellation if they haven't.