My tip, for any trolls (yeah even you kate, i'll let you have this one cos I care more about your content kid than you do) put Bio Oil on once they've scabbed.
My son was only 10 weeks old when he got it, thanks to being in and out of my daughter's nursery when they had an outbreak, so no collagen in his skin and I was worried about the scars cos he had pox really really bad due to zero immune system, despite being boobed, so I used that and it made a huge difference. He is 8 now and still pretty scarred, but compared to how many spots he had it could have been so much worse. It's so sad for a kid to get it so young and then be scarred for life. :-(
(so deffo never take a new baby to a pox party to get it out of the way - esp as people tell me he'll probably get it again)