The NHS being what it is..... (don't tell me you went to A+E please )
http://www.nhsdirect.nhs.uk/articles...x?articleID=97
Once the spots come out, you'll start to feel better, but you'll be infectious for 10-14d. 2 weeks of earl grey tea, paracetamol , day time telly and cool baths (try a camomile t-bag in the water) 'll sort it out.
You probably didn't have it as a child, you were probably mis-diagnosed.
Take some photo's to show the grandkids, they'll never come across it. (They'll be vaccinated
)