Mercury in vaccines from the Australian childhood immunization program schedule
http://www.ncbi.nlm.nih.gov/pubmed/20391108
Quantitation of DNA and Protein Impurities in Biopharmaceuticals -Liver Cancer?
http://pubs.acs.org/doi/abs/10.1021/ac00009a003
Cloned Hepatitis B Virus DNA causes hepatitis in chimpanzees
http://www.nature.com/nature/journal/v299/n5885/pdf/299740a0.pdf
The Dangerous Impurities of Vaccines
http://www.scribd.com/patrons99/d/49973741-Dangerous-Impurities
Adventitious Agents and Vaccines
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2631857/pdf/11485673.pdf
