- HIV: At first, patients with HIV may experience a flu-like illness, which can last for a few weeks, followed by a period of dormancy/no symptoms.

- AIDS: If the disease progresses,  patients may experience chills, fever, sweats, swollen lymph glands, weakness, and weight loss rare cancers, and opportunistic infections such as *Pneumocystis pneumonia*, *tuberculosis*, *cryptosporidiosis*, and *toxoplasmosis*.

Signs and Symptoms of HIV/AIDS

Acquired Immune Deficiency Syndrome (AIDS) is a serious and often fatal condition caused by the human immunodeficiency virus (HIV). The syndrome is characterized by a severely weakened immune system (immunosuppression), which makes an untreated individual vulnerable to numerous opportunistic infections.

Acquired Immune Deficiency Syndrome (AIDS)

Human immunodeficiency virus (HIV) is the virus that causes acquired immune deficiency syndrome (AIDS). It greatly weakens the immune system by infecting and destroying antibody-producing cells, leaving an untreated person vulnerable to opportunistic infections. HIV consists of two variants, HIV-1 and HIV-2, and a patient's condition is considered AIDS when their CD4 T-cell count drops below 200 cells/μL.

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- Epstein-Barr Virus (EBV)
- Cytomegalovirus Infections
- Yellow Fever
- Dengue Fever
- Chikungunya Fever
- Ebola Virus Disease
- Hantavirus
- Human Immunodeficiency Virus (HIV)

Viral Infections of the Circulatory and Lymphatic Systems

https://openstax.org/details/books/microbiology/

Microbiology covers the scope and sequence requirements for a single-semester microbiology course for non-majors. The book presents the core concepts of microbiology with a focus on applications for careers in allied health. The pedagogical features of the text make the material interesting and accessible while maintaining the career-application focus and scientific rigor inherent in the subject matter. Microbiology’s art program enhances students’ understanding of concepts through clear and effective illustrations, diagrams, and photographs.

Microbiology is produced through a collaborative publishing agreement between OpenStax and the American Society for Microbiology Press. The book aligns with the curriculum guidelines of the American Society for Microbiology.

OpenStax Microbiology Textbook

Spielman, R. M., Jenkins, W. J., & Lovett, M. D. (2020, April 22). Psychology (2nd ed.). OpenStax. https://openstax.org/books/psychology-2e/pages/1-introduction

OpenStax Psychology (2nd ed.) Textbook

EBV also known as Human herpesvirus 4 is a widespread pathogen associated with many diseases including mononucleosis and Burkitt Lymphoma.

  Epstein-Barr Virus (EBV)

Cytomegalovirus, also known as human herpesvirus 5 (HHV-5), is the major cause of non-Epstein-Barr infectious mononucleosis.

Cytomegalovirus 

Yellow Fever is caused by the pathogen *Flavivirus* and is transmitted to humans by mosquito vectors.

Yellow Fever

Dengue Fever is caused by four serotypes of *Flavivirus* species called called dengue 1–4 and is transmitted to humans through mosquitoes.

Dengue Fever

Chikungunya Fever is caused by the chikungunya virus (CHIKV) and is transmitted to humans through mosquitoes.

Chikungunya Fever

*Ebolavirus* is the pathogen responsible for Ebola Virus Disease.

Ebola Virus

*Hantavirus* is the genus of the nine viruses that cause hantavirus pulmonary syndrome (HPS) and hemorrhagic fever with renal syndrome (HFRS).

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