Information about Public Health Issues Related to Polonium-210 Contamination in the United Kingdom [open pdf - 66KB]
"The HPA has identified those people who it considers may have been exposed to Po-210 contamination, and since December 2006 has been working closely with public health agencies in 48 other countries, including the Centers for Disease Control and Prevention (CDC) in the United States, to contact people who may have visited the contaminated sites in London. The CDC, in turn, has been working with state and local health officials in 20 states to contact about 160 people to inform them about the potential for exposure and to assess their need for specific testing for Po-210 exposure. As of January 30, all urine test results for the approximately 17 people who chose to be tested indicate no person had amounts of Po-210 of concern for immediate health effects."
Department of Health and Human Services. Center for Disease Control and Prevention: http://www.bt.cdc.gov/