Humans have been dealing with viruses for thousands of years.... the new covid-19 (Corona) virus is no exception to this rule.... In the case of some viral diseases, vaccines and antiviral drugs have provided us with the possibility of preventing the widespread spread of infections and helping patients recover.... We managed to eliminate a new disease called smallpox and eliminate new cases called smallpox..

However, we are far from victory in the fight against viruses, including the corona virus.... In recent decades, several viruses have been transmitted from animals to humans and have caused thousands of deaths in significant outbreaks.... The Ebola virus strain that broke out in West Africa in 2014-2016 killed 90% of those infected.. family.

But there are other viruses that are just as or even more deadly.... Currently, a number of viruses, including the new coronavirus, have spread around the world, and although they have a lower fatality rate, they still pose a serious threat to public health because there is still no way to combat them.

Here are 12 of the deadliest viruses, based on how likely they are to kill someone, how many people have been killed, or whether they are considered a growing threat.

1.... Marburg virus

Scientists identified Marburg virus in a small outbreak in 1967 among laboratory workers in Germany who came into contact with infected monkeys imported from Uganda.... Marburg virus is similar to Ebola, which can cause hemorrhagic fever.. This means that infected people have a high fever and bleeding throughout their body, which can lead to shock, organ failure, and death.

According to the World Health Organization (WHO), the mortality rate in the first epidemic was 25%, but in the 1998-2000 outbreak in the Democratic Republic of Congo, as well as in the 2005 outbreak in Angola, it was over 80%.

2....Ebola virus

The first known outbreak of Ebola in humans occurred simultaneously in 1976 in the Republic of Sudan and the Democratic Republic of the Congo.. Ebola is transmitted through contact with blood or other body fluids or tissues of infected people or animals.. According to Elke Mühlberger, a microbiologist at the University of Libya and professor of the Ebola Virus Science Association at the University of Bulaton. is.

One of the species, called Ebola Reston, does not even make humans sick... But the mortality rate of the Bundibugyo species is 50%, and according to the World Health Organization, this rate is 71% for the Sudanese species.

According to the statistics of the World Health Organization, the outbreak of this disease in West Africa began in early 2014 and is the largest and most complex outbreak to date.

3.... rabies

Although the introduction of the rabies vaccine for domestic animals in the 1920s made the disease extremely rare in developed countries, the disease remains a serious problem in India and parts of Africa. "This virus damages the brain, and it's a really bad disease," Mahlberger said. He said: We have a rabies vaccine and we have antibodies that work against rabies, so if a person is bitten by a rabid animal, we can treat this person.

However, he stated that "if there is no treatment, there is a 100% chance of death."

4- HIV (AIDS)

In today's world, HIV may be the deadliest virus out there.... According to Dr. Amesh Adalja, an infectious disease physician and spokesperson for the Infectious Diseases Society of America, "this virus is still one of the biggest killers... an estimated 32 million people have died from HIV... HIV."

Strong antiretroviral drugs have made it possible for people to live with HIV for years....but the disease continues to ravage many low- and middle-income countries, where 95% of new HIV infections occur...

5....smallpox

The World Health Assembly declared the world free of smallpox in 1980... but before that, humans had been battling smallpox for thousands of years, and the disease killed 1 out of every 3 infected people, leaving the survivors with deep, permanent, often blind wounds.

Death rates were much higher in populations outside of Europe, where people had little contact with the virus until it was carried by travelers to those areas. For example, historians estimate that 90 percent of the native population of the Americas died from smallpox brought by European explorers.. Smallpox killed 300 million people in the 20th century alone.

According to Dr. Adalja, "Smallpox was something that imposed a heavy burden on the planet and it was not only death but also blindness and that is why efforts were made to eradicate it from the face of the earth."

6... Hantavirus

Hantavirus Pulmonary Syndrome (HPS) first gained widespread attention in 1993 with the death of a healthy young man and his fiancee in the Four Corners region of the United States who died after several days of shortness of breath...According to the Centers for Disease Control and Prevention, more than 600 people in the United States have been infected with HPS, and 36% have died as a result.

This virus is not transmitted from person to person, but people are infected by being exposed to the droppings of infected mice.

According to a 2010 article published in Clinical Microbiology Review, a different hantavirus had previously caused an epidemic in the early 1950s during the Korean War....More than 3,000 soldiers were infected and about 12% died.

While the virus was new to Western medicine after its discovery in the United States, researchers later found that Navajo Indian medicine described a similar disease and attributed it to rats.

7.... flu

According to the World Health Organization report, during an influenza outbreak, up to 500,000 people worldwide die from this disease... But sometimes, with the emergence of a new type of influenza, the emergence of a pandemic (global epidemic) leads to a faster spread of the disease and often more cases.

The deadliest influenza pandemic, sometimes called the Spanish flu, began in 1918 and sickened up to 40 percent of the world's population, killing about 50 million.

Mehlberg said in this regard: "I think there is a possibility that the 1918 flu will happen again.... We will face a big problem with the emergence of a new type of flu in the human population that can easily be transmitted between humans and cause severe disease."

8... Dengue virus

Dengue virus first appeared in the Philippines and Thailand in the 1950s and has since spread throughout the tropical and subtropical regions of the world.. Currently, about 40 percent of the world's population lives in areas where dengue fever is endemic, and the disease is likely to spread even more - with the mosquitoes that carry it - as the world warms.

According to the World Health Organization, dengue disease infects 50-100 million people annually... Although the death rate of dengue fever is lower than some other viruses, i.e. 2.5%, this virus can cause an Ebola-like disease called dengue hemorrhagic fever, and if untreated, the death rate of this virus is really 20%... It is a real threat to us.

According to the CDC (US Centers for Disease Control and Prevention), the dengue vaccine was approved by the US Food and Drug Administration in 2019 for use in children aged 9-16 years living in dengue-endemic areas with a confirmed history of viral infection. In some countries, there is an approved dengue vaccine for ages 9-45, but it must be reapproved.. Past.... People who have not been exposed to the virus may be at risk of severe dengue if they receive the vaccine.

See more: Infectious disease doctor

9.... Rotavirus

Rotavirus is the leading cause of severe diarrheal disease in infants and young children, and there are currently two vaccines to protect children against the virus. The virus can spread rapidly through what researchers call the fecal-oral route (ie, small particles of feces are swallowed).

Although children rarely die from rotavirus infection in developed countries, the disease is fatal in developing countries where hydration treatments are not widely available. According to WHO estimates, 453,000 young children under the age of 5 died worldwide from rotavirus infection in 2008.

10....Corona acute respiratory syndrome (SARS)

According to the statistics of the World Health Organization, the virus that causes acute respiratory syndrome, or SARS, first appeared in 2002 in Guangdong province in southern China.... The virus probably started from bats and was transferred to nocturnal mammals called civets before infecting humans.... 8,000 people and more than 770 people were killed in two years.

The disease causes fever, chills, and body aches, and often progresses to pneumonia (a severe condition in which the lungs become inflamed and filled with pus).. The fatality rate for SARS is about 9.9 percent, and there is no approved treatment or vaccine.. However, no new cases of SARS have been reported since early 2009..

11... Covid-2019 or SARS-CoV-2

SARS-CoV-2 belongs to the large family of SARS coronavirus viruses, which are also known as corona viruses.... The 2019 coronavirus was first identified in December 2019 in the city of Wuhan, China.... Like SARS-CoV, this virus probably originated in bats and passed through the animal environment before infecting people.. Since its emergence, this virus has killed tens of thousands of people in China and thousands of others. The ongoing outbreak has led to widespread quarantines of Wuhan and surrounding cities, restrictions on travel to and from infected countries, and a global effort to develop diagnostics, treatments, and vaccines.

This disease caused by SARS-CoV-2, which is called COVID-19, has a mortality rate of about 2.3%.... It seems that elderly people or people with underlying diseases are more susceptible to severe disease or complications.. Common symptoms include fever, dry cough, and shortness of breath, and in severe cases, the disease can lead to pneumonia. Participate in GCORP LLC

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12... MERS virus or MERS-CoV

The virus that causes Middle East Respiratory Syndrome, or MERS, led to an epidemic in Saudi Arabia in 2012 and another in South Korea in 2015. MERS often progresses to severe pneumonia, and with a fatality rate of 30 to 40 percent, it is the deadliest virus known to be transmitted from animals to humans.. Like SARS-CoV, MERS has no approved treatment or vaccine.

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