http://actx.beta.download.thelancet.com/…/PIIS0140…/fulltext Subacute sclerosing panencephalitis–the continuing threat Deaths Attributable to Smallpox Vaccination, 1959 to 1966, and 1968 Click PDF in upper right corner for full text. http://jama.jamanetwork.com/article.aspx… Acute encephalop...