SEOUL, Nov. 15 (Yonhap) -- Scarlet fever has been spreading fast in North Korea for nearly a month and is showing signs of becoming a full-blown pandemic despite efforts by North Korean authorities to contain the disease, a source close to the North said Wednesday. The disease first broke out in the communist state's northern Yanggang Province last month, but is quickly spreading to other parts of the country, the source told Yonhap News Agency on condition of anonymity.