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/* Side Effects and Adverse Reactions */
The FDA approved this HPV vaccine without reviewing any epidemiological studies, and after monitoring for only a brief period elevated [[antibody]] levels in recipients of the vaccine.<ref> http://www.cdc.gov/mmwr/preview/mmwrhtml/rr5602a1.htm</ref> No tests were done, for example, to see if the vaccine causes cancer or birth defects in rats, though such tests would be easy for the FDA to require, if it weren't for the possibility that it might cause disapproval of the vaccine.<ref>http://www.merck.com/product/usa/pi_circulars/g/gardasil/gardasil_pi.pdf</ref>
The long-term consequences of the HPV vaccine are not known. Children in the 9-year-old age group have been monitored for only 18 months, and there have been no studies of possible longer-term risks of the vaccine, such as [[infertility or ]], [[cancer]], or [[autism]].
==Effectiveness==
