“…Measles virus, normally associated with acute childhood infections, has been implicated in a slow persistent infection in children and young adults, namely subacute sclerosing panencephalitis (SSPE) (Baublis & Payne, 1968;Bouteille et al, 1965;Connoly et al, 1967;Horta-Barbosa et al, 1969), and has also been linked with multiple sclerosis (Cathala & Brown, 1972;Levy et al, 1976) and Paget's bone disease (Basl6 et al, 1979). Measles virus is antigenically stable, a single infection giving life-long immunity.…”