Explanation:1)-immediate cause of the diseaseDepends on the disease, obviously (or it should be obvious). Each has its own cause, cure, and prevention. There is no possible way to cure or treat all diseases.Infectious diseases are CAUSED by infectious agents: bacteria, viruses, fungi, protozoans, helminths, parasites, etc. (Ex: the COLD, athlete’s FOOT, AIDS, malaria, head lice). You prevent these by not being infected or by getting vaccinated against them. Cures and treatments vary.2)-defination of infectious diseaseA disease that is caused by a microorganism, such as a bacterium, virus, or protozoan, that is not normally FOUND in the body and is capable of causing infection. Some, but not all, infectious diseases are contagious, meaning they can spread from person to person.3)Pathogen causing Dengue fever.Dengue fever, also known as breakbone fever, is a mosquito-borne infection that can lead to a severe flu-like illness. It is caused by four different viruses and spread by AEDES mosquitoes.4)-Vector Responsible Foe dengueVector of dengue fever. Dengue infection is transmitted from one person to other by the bite of an infected female Aedes mosquito. Dengue fever (DF) is a viral infection caused by any of the four types of dengue virus ( DENV -1 to DENV-4).Thank you