1. Marburg virus
The most dangerous virus is the Marburg virus. It is named after an idyllic little town on the Lahn River - but it has nothing to do with the disease itself. Marburg virus is a hemorrhagic fever virus. As with Ebola, the Marburg virus causes convulsions and bleeding in the mucous membranes, skin and organs. It has a 90% mortality rate.
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2. Ebola virus
Its melodic nickname may fall from the tongue, but if you do get the virus, it\'s not the only thing that will come out of your body: you will likely have a disturbing amount of blood coming out of your gums, for example. Four of the five known Ebola virus strains are the cause of Ebola virus disease (EVD), which has killed thousands of people in sub-Saharan African countries since its discovery in 1976.
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The first cases were identified in late 2019 in Wuhan, the capital of China\'s Hubei province, when hospitals began to see patients with severe pneumonia. Like the viruses that cause MERS and SARS, the new coronavirus appears to originate from bats, but it is not known how the virus spread from bats to humans or where the first infections occurred. Pathogens often cross an intermediate \"animal reservoir\" - bats infect animals and humans come into contact with certain products from this animal. It could be undercooked milk or meat, or even mucus, urine or feces. For example, MERS moved to humans through camels, and SARS came through civet cats sold at a live animal market in Guangzhou, China.
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There are many strains of floating hantavirus (yes, it is airborne). Different strains, carried by different rodent species, are known to cause different types of disease in humans, including hemorrhagic fever with renal syndrome (HFRS) - discovered during the Korean War - and hantavirus pulmonary syndrome (HPS) , which appeared with a 1993 epidemic in the southwestern United States. Severe HFRS causes acute kidney failure, while HPS affects you by filling your lungs with fluid (pulmonary edema). HFRS has a mortality rate of 1 to 15 percent, while HPS is 38 percent. The United States saw its latest outbreak of hantavirus, the HPS variety, in Yosemite National Park in late 2012.
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Although rabies vaccines for pets, which were introduced in the 1920s, contributed to making the disease extremely rare in the developed world, this condition remains a serious problem in India and parts of Africa. \"It destroys the brain, it\'s a really, really bad disease,\" said Muhlberger. \"We have a rabies vaccine and we have antibodies that work against rabies, so if someone is bitten by a rabid animal, we can treat that person,\" she said. However, she said, \"If you don\'t get treatment, there is a 100% chance that you will die.\"
6. DENGUE VIRUS
The main cause of death in tropical and subtropical regions is the infection caused by the dengue virus, which causes high fever, severe headaches and, in the worst cases, hemorrhage. The good news is that it is treatable and not contagious. The bad news is that there is no vaccine and you can get it easily by the bite of an infected mosquito, which puts about 3 billion people at risk. The CDC estimates that there are more than 400 million cases of dengue infection and that 100 million people suffer from symptoms each year. It is a great marketing tool for insect spraying.
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7. INFLUENZA VIRUS
No virus can claim more pandemics and epidemics in the world than the flu. The Spanish flu in 1918 is generally considered to be one of the worst pandemics in human history, infecting 20 to 40% of the world\'s population and killing 50 million people in just two years. H1N1 swine flu was its most recent editor, when a 2009 pandemic may have caused between 100,000 and 400,000 deaths worldwide in its first year.
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In the modern world, the deadliest virus of all may be HIV. \"It\'s always the one that kills the most,\" said Dr. Amesh Adalja, infectious disease physician and spokesperson for the Infectious Disease Society of America. It is estimated that 32 million people have died from HIV since the disease was first recognized in the early 1980s. \"The most serious infectious disease affecting humanity today is HIV\", a said Adalja. Powerful antivirals have helped people live for years with HIV. But the disease continues to devastate many low- and middle-income countries, where 95% of new HIV infections occur. Almost one in 25 adults in the WHO African region are HIV positive, representing more than two-thirds of people living with HIV worldwide.
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9. Japanese encephalitis
This virus is the most frequent cause of epidemic viral encephalitis in several countries across Asia, with an estimated 68,000 clinical cases annually, according to the WHO. In fact, 24 countries in the WHO South-East Asia and Western Pacific regions have endemic Japanese encephalitis virus transmission, putting over 3 billion people at risk for infection. Symptoms include fever, neck rigidity, altered consciousness, headache, tremors, incoordination, and convulsions. Not only is the death rate of this disease high (30%), but survivors (30% to 50%) experience serious neurologic or psychiatric sequelae. This disease is spread to humans by infected mosquitoes of the Culex species that live in Asian rice fields, with reservoirs including water birds and pigs. An inactivated vaccine does exist for protection against this virus, and mosquito protection is recommended among those at high risk of exposure. Because no antiviral therapy yet exists for infected patients, treatment is symptomatic.
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