Oral, live-virus vaccine (OPV) can cause polio in vaccine recipients and contacts. It has caused Guillain-Barre syndrome (GBS) in recipients. It may also contain live monkey viruses that have been associated with human diseases. The oral vaccine is no longer recommended in the U.S.
Killed polio vaccine (IPV) has also caused significant effects, including cancers from a contaminated vaccine, but is not known to cause polio in recipients.
The Vaccine Guide: Risks and Benefits for Children and Adults, Randall Neustaedter, OMD
Inactivated Polio Vaccine (IPV) – IPOL – Sanofi Pasteur – Product Insert
Long-term studies in animals to evaluate carcinogenic potential or impairment of fertility have not been conducted. It is also not know whether IPOL vaccine can cause fetal harm when administered to a pregnant woman or can affect reproductive capacity. It is not known whether IPOL vaccine is excreted in human milk. (Page 2)
Deaths and GBS have occurred in temporal association after vaccination of infants with IPV. (See page 4)
IPOL Ingredients: 2-phenoxyethanol, formaldehyde, neomycin, streptomycin, polymyxin B, monkey kidney cells, Eagle MEM modified medium, calf serum protein, Medium 199