Answer:
Doris estate will be held responsible for her medical bill because that is where she is staying except if she has a relative that would take care of the hospital bill. If not the estate will have to settle the bill.
Explanation:
Smallpox<span> vaccine, the first successful vaccine to be developed, was introduced by Edward Jenner in 1796. He followed up his observation that milkmaids who had previously caught </span>cowpox<span> did not later catch </span>smallpox<span> by showing that inoculated</span>cowpox<span> protected against inoculated </span>smallpox<span>.</span>
