I think noro is the lottery from hell, it picks it's victims at random. I'm b positive and had a mild form of noro when all around me were hugging buckets. Who really knows, we emets probably know as much info as the experts. The only sites I trust on any medical matters is the NHS web side or the US CDC. After watching the news this morning noro looks like a walk in the park compared to Ebola, hoping and praying it doesn't spread to the rest of the world.