Neuromyelitis optica following human papillomavirus vaccination

The quadrivalent human papillomavirus (HPV) vaccine Gardasil (Merck & Co., Whitehouse Station, NJ) (qHPV-vac) was recently approved for immunization of adolescent girls to prevent cervical cancer.[1][1] Recently, 5 cases of multiple sclerosis (MS) were reported following qHPV-vac vaccination.[2][2]