Moderator note - three threads on questions in the UK House of Lords and House of Commons have been merged at the request of the original posters "The Countess of Mar Deputy Chairman of Committees, Deputy Speaker (Lords) To ask Her Majesty's Government whether the Department of Health recognises Chronic Fatigue Syndrome which develops up to six months after vaccination with human papilloma virus vaccine as a symptom of an adverse reaction to the vaccine. Lord O'Shaughnessy The Parliamentary Under-Secretary of State for Health Chronic Fatigue Syndrome (CFS) is a condition that occurs naturally in the age group eligible for human papillomavirus (HPV) vaccine. The Medicines and Healthcare products Regulatory Agency has completed a United Kingdom epidemiological study which found no evidence to suggest that HPV vaccine may increase the risk of developing CFS. The results of this study were published in a peer-reviewed scientific journal in 2013. This finding is further supported by the results of a recent population-based study in Norway, which similarly found no evidence of a causal association between HPV vaccine and CFS. Copies of HPV vaccination and risk of chronic fatigue syndrome/myalgic encephalomyelitis: A nationwide register-based study from Norway and Bivalent human papillomavirus vaccine and the risk of fatigue syndromes in girls in the UK are attached." Don't know what they mean by 'condition that occurs naturally"(?) Anyone like to dig out these studies?