Gardasil is the only vaccine that may guard against HPV, which can lead to cervical cancer.
Gardasil injection has painful reputation
(KABC) Merck, the makers of Gardasil, think the sting may come from virus-like particles that are in it. During its first year, there was a rise in reports of pain, but some pediatricians don't believe the "ouch" factor has reduced demand.
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