1. Marburg virus
According to the World Health Organization (WHO), the Marburg virus was first identified by scientists in 1967, when small epidemics occurred among laboratory staff in Germany. They became infected with the virus after coming into contact with monkeys from Uganda.
According to the Mayo Clinic, symptoms of the Marburg virus are similar to Ebola in that both can cause dengue fever. People infected will have a high fever and bleed all over their bodies, leading to shock, organ failure and death.
The mortality rate in the first outbreak in 1967 was 24%, but increased to 83% in the 1998 playground in Congo and 100% in the 2017 playground in Uganda, according to the WHO.
2. virus virus
In 1976, the first ever ever ever ever ever ever ever ever ever ever African-American outbreak occurred simultaneously in Sudan and Congo. Ebola is spread through blood or other body fluids, or the tissue of infected humans or animals.
virus Ebola expert, associate professor of probiotics Elke Muhlberger from Boston University (USA) said that different strains have different levels of danger.
According to Essential Human Virology (2016), the Ebola Reston virus does not even make people sick, but the Bundibugyo strain has a mortality rate of up to 50% while the Sudan strain is up to 71%.
3. Rabies virus
Although rabies vaccines for livestock have made the disease extremely rare in developed countries, it is still a serious problem in India and some parts of Africa.
We are infected with the rabies virus after being bitten or scratched by animals with rabies. It affects the brain and nerves.
According to the UK National Health Service (NHS), once symptoms begin to appear, death almost always occurs afterwards.
Muhlberger said that if left untreated, the chance of death was 100%.
4. HIV
Today, the most dangerous virus seems to be HIV. An estimated 32 million people have died from HIV since it was first discovered in the early 1980s.
Powerful antiseptic drugs have helped people infected with HIV prolong their life, but this virus is still devastating many low- and middle-income countries - where it accounts for 95% of new HIV infections.
Nearly 1 in 25 adults in Africa are HIV positive, according to the WHO. In 2020, there were 680,000 HIV-related deaths worldwide.
5. Bean disease
In 1980, the World Health Council declared that the world no longer has seasonal bean sprouts. Previously, humans had to fight this disease for thousands of years. According to the BBC, bean sprouts have killed about a third of all people infected with the disease. It left a deep and lasting scar, sometimes blind, for survivors.
In communities outside Europe - where people are less exposed to the virus before it is brought to their homes - the mortality rate is much higher. Historists estimate that seasonal foot and mouth disease has killed 90% of the indigenous population of the Americas. In the 20th century alone, the disease killed 300 million people.
6. virus Hanta
Hanta (HPS) lung syndrome was first widely noticed in the US in 1993, according to the Center for Disease Control and Prevention (CDC). More than 600 people in the US have had HPS and 36% have died from the disease.
Hanta virus is not transmitted from person to person. People are infected with the virus when exposed to the feces of animals infected with the virus.
Previously, another Hanta virus strain caused an outbreak in the early 1950s during the Korean War, according to a 2010 paper in the journal Clinical Microbiology Reviews. More than 3,000 UN soldiers were infected and about 12% of them had died.
7. Influenza virus
According to the WHO, during the typical flu season, up to 650,000 people died worldwide. But sometimes, when a new strain of the flu appears, it causes a pandemic with a faster spread rate and a higher mortality rate.
According to the CDC, the deadliest flu pandemic began in 1918. Of which, 40% of the world's population is infected and about 50 million people die.
8. Dengue fever virus
The dengue virus first appeared in the 1950s in the Philippines and Thailand. It has since spread across tropical and subtropical regions worldwide, according to Clinical Microbiology Reviews.
According to Nature, up to 40% of the world's population currently lives in areas with dengue fever. This disease is likely to spread more widely as the Earth warms.
The WHO says about 100-400 million people suffer from dengue fever each year with a lower mortality rate than some other viruses. The dengue fever virus can cause a Ebola-like disease called dengue fever, which has a mortality rate of 20% if left untreated.
9. virus rota
virus rota is the leading cause of serious diarrhea in infants and young children. WHO estimates that there are more than 25 million outpatients and 2 million hospitalizations each year due to rota virus infection worldwide.
10. virus SARS-CoV
According to WHO, SARS-CoV was first identified in 2003 during an outbreak in China. SARS has since spread to 26 countries around the world, infecting more than 8,000 people and killing more than 770 in the past few months, according to History.com.
According to the CDC, SARS causes fever, chills, body aches and often progresses to pneumonia - a severe condition that causes the lungs to become inflamed and filled with pus. This type of virus has an estimated mortality rate of 9.6%.
11. virus SARS-CoV-2
SARS-CoV-2 was first identified in December 2019 in Wukhan City, China. The virus can originate from bat and be transmitted through intermediate animals before being transmitted to humans.
Reuters reported that since its appearance, this virus has caused more than 5 million deaths worldwide.
According to WHO, SARS-CoV-2 causes COVID-19. Symptoms include fever, cough, loss of taste, loss of smell, shortness of breath, chest pain and loss of mobility.
12. MERS-CoV
MERS broke out in Saudi Arabia in 2012 and in South Korea in 2015. The WHO said that this virus has spread in camels before spreading to humans and can cause fever, cough and shortness of breath.
The disease often progresses to severe pneumonia and has an estimated mortality rate of about 35%. According to the NHS, there is no vaccine to prevent this virus. The best way to reduce the risk of infection is to wash your hands regularly, avoid contact with camels and do not consume products containing fresh animal milk.
