The purpose of this study is to collect blood and other specimens from people with periodic fever, aphthous stomatitis, pharyngitis, and cervical adenitis (PFAPA) to learn more about the illness.

This purpose of this study is to examine growth factors that promote and inhibit mast cell proliferation resulting in mastocytosis, a disease of excessive mast cells in the body.

This study will evaluate and treat patients with filarial infections to explore in depth the immunology of the disease, including susceptibility to infection, disease development, and response to treatment.

The purpose of this study is to obtain samples from people with respiratory viruses to learn more about respiratory virus infections and the immune responses against them.

The purpose of this study is to test a procedure in which messenger RNA (mRNA) is added to a persons blood cells.

The purpose of this study is to learn about how the immune system and skin healing are related to each other.

The purpose of this study is to evaluate the safety and efficacy of the tyrosine kinase inhibitor, imatinib mesylate (Gleevec ) in reducing peripheral blood eosinophilia in patients with the myeloid form of hypereosinophilic syndrome (HES).

The purpose of this study is to examine the causes of immune disorders affecting white blood cells, which defend against infections and will try to develop better means of diagnosis and treatment of these immune disorders.

The objective of this study is to test a skin treatment that contains Roseomonas mucosa and ground cardamom seeds in people with atopic dermatitis (AD).

The purpose of this study is to determine the biochemical and genetic causes of inherited immune diseases affecting lymphocyte homeostasis.