After years and years of decline, scarlet fever, the disease that once struck fear into the hearts of parents is once again hitting United Kingdom and some parts in Asia and in Southeast Asia, specifically Vietnam.Scarlet fever, a common cause of childhood death in the 1800s and early 1900s, has seen an upsurge in England since 2011, scientists said last Tuesday in The Lancet Infectious Diseases, a leading medical journal.Identifying the cause for the increased cases was "a public health