Sandra Levy wants to do everything she can to safeguard the health of her 11-year-old daughter -- and that, of course, includes cancer prevention. She has had her child inoculated with one shot of Gardasil, the human papilloma virus vaccine that may prevent cervical cancer. But now, she says, she has serious reservations about going ahead with the next two injections of the course. Though most medical organizations strongly advocate using the HPV vaccine, some doctors and parents, like Levy, are asking whether the vaccine's benefits really outweigh its costs. A report released in June stirred up more doubts. Although cause and effect were not proved, the report listed serious events -- such as seizures, spontaneous abortions and even deaths -- among teens, preteens and young women who had earlier had Gardasil shots. [The] analysis, released June 30 by the Washington, D.C.-based public interest group Judicial Watch, [has] raised [these] red flags. Judicial Watch obtained records from the FDA's Vaccine Adverse Event Reporting System (VAERS), a voluntary system used by doctors, patients and drug companies to report side effects with vaccines to the federal agency. The report revealed that since the vaccine's 2006 approval, when girls began getting it, nearly 9,000 had bad health events after receiving Gardasil. The incidents included 10 miscarriages, 78 severe outbreaks of genital warts and six cases of Guillain-Barr syndrome, an autoimmune disorder that can result in paralysis. There were also 18 reported deaths.