Welcome to the website for the Coalition of Eosinophil Patient Advocacy Groups (C-EOS). C-EOS was established in 2014 to unite organizations representing the interests of patients with eosinophil associated diseases to advance key issues of importance to this population. The majority of eosinophil associated diseases lack approved treatments, and there is no cure. By uniting like-minded organizations that support patients with these diseases, we will strengthen support for research and advocacy opportunities.