De ngaki is a virus, the virus is mosquito as carrier bringing the disease spreading was found at most in the world. There are 50-100 million infections per year and have died from dengue disease more than 10000 entries per year. De ngaki is a virus a virus family Flaviviridae RNA types classified with 4 serotype: DEN 3 and DEN2 DEN1.DEN4 De ngaki virus infection in one serotype causes immunity against the serotype forever (homotypic immunity), but it can prevent the virus serotype ngaki update. Another temporary (heterotypic immunity). So the patient can infect other viruses de ngaki serotype is different from the first infection and subsequent infection occurred, called a secondary infection.
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