A second clade included both alastrim minor (a phenotypically mild smallpox) described from the American continents and isolates from West Africa which diverged from an ancestral strain between 1,400 and 6,300 years before present.
Un segundo clado incluía o alastrim (unha varíola fenotipicamente leve) descrita nos continentes americanos e illada en África occidental, que diverxiu a partir dunha capa ancestral hai entre 1.400 e 6.300 anos.