Social Security. Benefits for People with Disabilities. The Social Security and Supplemental Security Income disability programs are the largest of several Federal programs that provide assistance to people with disabilities.
Heterophile antibodies can cause significant interference in any immunoassay. The presence of a heterophile antibody is characterized by broad reactivity with antibodies of other animal species (which are often the source of the assay antibodies).
Heterophil antibodies decline after the fourth week of illness, and the Monospot test will become negative as the infection resolves. A negative test result means that a person may not have mononucleosis or that it is too early in the illness to detect the antibodies.