President Bush’s plan to vaccinate 500,000 health care workers against smallpox is getting off to an unexpectedly slow start as hundreds of hospitals and thousands of nurses across the country say that they will not participate. The Centers for Disease Control and Prevention said today that only 687 volunteers in 16 states had been vaccinated since the program began two weeks ago, though it has shipped 250,000 doses of vaccine to 41 states. Full Story