Up to 450,000 doctors, nurses and other health care workers are ready to be vaccinated against smallpox when President Bush gives the go-ahead, the U.S. Centers for Disease Control and Prevention said on Thursday.
注：vaccinate:预防接种 smallpox:天花 go-ahead:同意，批准
Bush was expected to give details of the plan on Friday. He is expected to say 500,000 troops and nearly as many health care workers will be the first to get the vaccines.
another 8 million or so health care workers could be vaccinated later in 2004, with the vaccine eventually being offered freely to the public as it becomes available.
The CDC asked states to submit detailed plans on who would be vaccinated in the first stages of the plan and how.
"So far, 49 states and four cities have submitted plans," the CDC said in a statement.
It adds up to 450,000 people who are ready to be immunized, the CDC said. These would all be volunteers and carefully screened in an effort to minimize the side effects from the vaccine
Based on the earliest known vaccine technology, the vaccine kills an estimated one or two in every million people who get it and sends at least a dozen more to the hospital with serious illnesses such as encephalitis.
Today's population may be even more vulnerable to such side-effects, the CDC says, so the agency is urging careful choices about who gets the vaccine.