# What are viral hemorrhagic fevers? Canonical page: https://clinicsjo.com/en/faq/what-is-viral-hemorrhagic-fever Language: en Category: infectious Publisher: ClinicsJo Published: 2026-09-13T08:09:52.052Z Content updated: 2026-09-13T08:09:52.052Z Translation (ar): https://clinicsjo.com/ar/faq/what-is-viral-hemorrhagic-fever Viral hemorrhagic fevers (VHFs) are a group of serious infectious diseases caused by various families of viruses. These diseases primarily affect multiple body systems and cause damage to the vascular and cardiovascular systems, which limits the body's ability to function efficiently. The severity of these infections varies from relatively mild cases to life-threatening illnesses, with clinical symptoms depending on the type of causative virus [\[1\]](). ## Nature and Transmission of Hemorrhagic Fevers Transmission routes for these viruses vary based on their natural reservoirs; many are spread via animals or insects. For example, viruses such as Ebola and Marburg are transmitted through direct contact with the bodily fluids of an infected person, while other viruses, like Crimean-Congo hemorrhagic fever, are transmitted via tick bites or handling the blood of infected animals [\[1\]]() [\[2\]](). Arenaviruses can also be transmitted through contact with rodent excreta or by inhaling contaminated air [\[1\]](). In healthcare settings, the failure to use appropriate personal protective equipment or the reuse of needles and contamination of medical instruments pose a significant risk for human-to-human transmission [\[2\]](). For more details on preventive measures, you can review [Viral Hemorrhagic Fevers: Understanding Infection, Prevention, and Outbreak Response (Arabic)](). ## Clinical Symptoms and Medical Intervention Symptoms of these fevers usually begin suddenly and often include high fever, severe muscle and joint pain, and acute headache, followed in advanced stages by internal or external bleeding, such as nosebleeds, bleeding gums, or the appearance of a hemorrhagic rash [\[2\]]() [\[3\]](). Patients may experience gastrointestinal disorders including nausea, vomiting, and acute diarrhea, and in advanced cases, organ failure such as liver, kidney, or respiratory failure may occur, increasing the likelihood of death [\[2\]]() [\[3\]](). ## Diagnosis and Treatment Early diagnosis is essential due to symptom overlap with other diseases like malaria or typhoid. Infection is confirmed through specialized laboratories using techniques such as real-time polymerase chain reaction (RT-PCR) or antibody tests (ELISA), with the necessity of handling samples under the highest biosafety levels [\[2\]]() [\[3\]](). Currently, there are no approved and effective treatments or vaccines for all types of these fevers, and medical intervention relies primarily on intensive supportive care, such as fluid replacement and treatment of individual symptoms to improve survival chances [\[2\]]() [\[3\]](). Seek emergency medical care immediately if symptoms such as sudden fever with unexplained bleeding occur, especially after traveling to endemic areas or handling wild animals. Do not attempt self-treatment, as these conditions require specialized medical care and close monitoring within equipped facilities. ## Medical references - [About Viral Hemorrhagic Fevers]() - [Crimean-Congo haemorrhagic fever]() - [Marburg Virus Disease]() General health education; not a substitute for individualized clinical assessment. Citation URL: https://clinicsjo.com/en/faq/what-is-viral-hemorrhagic-fever#answer