The rare disease in a remote town where 'almost everyone is a cousin' / Town where 'nearly everyone is a cousin' ravaged by extremely rare disease / 74 sick with rare illness as link to farm investigated / Pioneering therapy from Spain saves 'unluckiest American family in the world' with rare terminal disease / 'Urgent need to raise awareness about rare diseases' / Is this the new playbook for curing rare childhood diseases? / Rare diseases policy set for expansion to include rare dermatological conditions / Lack of understanding hinders rare diseases treatment: CDFD / Mpox: America reports first case of new form of rare disease / Girl's life saved by pioneering rare diseases study