A practitioner took a scab from someone with a mild case, made an incision in the skin of a healthy person, and infected that person with the scab. Sheep-scab is a loathsome skin disease due to an acarian parasite.
I did find this link, but I don't think it will help out much, because there is nothing on the internet about it, other than this. http://en.allexperts.com/q/Wild-Animals-705/frozen-crab-life-thawed.htm. Or you can go to this link. Its about frozen lobsters coming back to life after thawed.
It is better to get a lobster that is still alive. Dying lobsters tend to eat away at theirself as they die so when you cook a already dead lobster theirs not as much meat inside. Also depending on how long the lobster has been dead it could make you sick too.