The pox is related to the vaccinia virus , and got its name from the distribution of the disease when dairymaids touched the udders of infected cows .
After infection with the disease , the body -LRB- usually -RRB- gains the ability recognize the similar smallpox virus from its antigens and so is able to fight the smallpox disease much more efficiently .
After infection with the disease , the body -LRB- usually -RRB- gains the ability recognize the similar smallpox virus from its antigens and so is able to fight the smallpox disease much more efficiently .
Simplify this text: The pox is related to the vaccinia virus , and got its name from the distribution of the disease when dairymaids touched the udders of infected cows . Output: