evidence: An article published by Children’s Health Defense on 7 November 2023 claimed that a campaign for human papillomavirus (HPV) vaccination in low- and middle-income countries will result in a "mass casualty event" due to serious side effects caused by the vaccine. Purported side effects of the HPV vaccine include autoimmune and neurological disorders such as myalgic encephalomyelitis/chronic fatigue syndrome, fibromyalgia, and postural orthostatic tachycardia syndrome (POTS). We previously reviewed a claim that HPV vaccines cause autoimmune and neurological diseases and found that it was unsupported. [See scientists’ feedback.] [...] The article claimed that side effects of HPV vaccination involve neurological and autoimmune disorders, including chronic fatigue syndrome, fibromyalgia, and postural orthostatic tachycardia syndrome (POTS), but scientific evidence doesn’t support these conclusions.