Latex allergy allergy is an IgE (immune) mediated reaction to proteins found in the "Hevea brasiliensis" tree, a type of rubber tree. Testing for type I natural rubber latex allergy is through blood testing to determine if the patient is producing IgE antibodies to latex proteins. Anaphylactic shock can be provoked in allergic persons by the "previous" use of latex in an area: latex is typically powdered to prevent sticking, latex proteins become attached to the particles of powder, and the powder becomes airborne when the latex item is used, triggering potentially life-threatening Type I reactions when the latex-contaminated powder is inhaled
What Is Life "Close to the Edge", "Mojo", December 2003, p. 82.</ref> It was while driving up to a Preston session in London from his home in Esher, Surrey, that Harrison came up with the song "What Is Life". In his autobiography, "I, Me, Mine", Harrison describes it as having been written "very quickly" and recalls that he thought it would be a perfect, "catchy pop song" for Preston to record. His lyrics, while simple, were similarly uplifting and universal: These lyrics have caused some debate among biographers and music critics, as to whether "What Is Life" should be viewed as a straightforward