Study says it is safe , although chances of infection or a blood clot exist . Critics say Gardasil 's maker Merck did n't address safety of vaccine . Vaccine does not protect against all strains of HPV .
Study says Gardasil is safe , although chances of fainting or getting blood clot exist . Critics say Gardasil 's maker Merck did n't address complexity of vaccine . Vaccine does not protect against all types of HPV .