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Regarding your question

What is HIV disease?

HIV is a virus. Some viruses, such as the ones that cause colds or flu, stay in the body for only a few days. HIV, however, never goes away. A person who is infected with HIV is said to be "HIV positive." Once a person is HIV positive, that person will always be HIV positive.
H - Human. This virus infects human beings.
I - Immunodeficiency. This virus attacks a person's immune system. The immune system is the body's defense against infections, such as bacteria and viruses. Once attacked by HIV, the immune system becomes deficient and doesn't work properly.
V - Virus. A virus is a type of germ too small to be seen even with a microscope.

What are the earliest signs of HIV?

1.nausea and vomiting.
2.persistent diarrhea.
3.chronic fatigue.
4.rapid weight loss.
5.cough and shortness of breath.
6.recurring fever, chills, and night sweats.
7.rashes, sores, or lesions in the mouth or nose, on the genitals, or under the skin.

How is HIV transmitted?

1-Through blood transfusion
2.Blood to blood contact
3.Sexual relations and mixture of fluid
4.Open wounds 

What is the investigations for HIV?

1.Clinical assessment at the nearest medical center
2.Blood analysis
3.Check HIV antigen
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