/** Add Page Number to Meta Description to avoid Duplication **/
if ( ! function_exists( 't5_add_page_number' ) )
{
    function t5_add_page_number( $s )
    {
        global $page;
        $paged = get_query_var( 'paged' ) ? get_query_var( 'paged' ) : 1;
        ! empty ( $page ) && 1 < $page && $paged = $page;

        $paged > 1 && $s .= ' - ' . sprintf( __( 'Page %s' ), $paged );

        return $s;
    }
    add_filter( 'wpseo_metadesc', 't5_add_page_number', 100, 1 );
}