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The most deadly epidemics in history


Is Corona the first disease that appears to the world and frightens it, of course not, there are many deadly diseases much more severe than Corona that appeared throughout history and killed millions of people in this article, we will review some of them

The most deadly epidemics in history


Flu

It appeared in Egypt 1650 BC 1550 BC
This name was not known at this time
Flu is an infectious disease caused by severe mucosal viruses. Symptoms of the flu can be mild or very severe
Symptoms include fever, nasal irritation, sore throat, muscle pain, headache, cough, and fatigue. These symptoms usually begin two days after exposure to the virus and continue for less than a week. But coughing may last for more than two weeks. In children, there may be nausea and vomiting, but these symptoms are not common in adults. Nausea and vomiting are more common due to gastroenteritis due to infection, which is sometimes referred to as "stomach flu" or "24-hour flu". Complications include
These include: viral pneumonia, secondary bacterial pneumonia, sinus infections, and exacerbation of previous health problems such as asthma or heart failure


Typhoid fever

His first known appearance in Greece 430 BC 427 BC
It is an infectious disease that results from eating or drinking substances contaminated with certain types of salmonella
Typhoid fever is one of the oldest diseases that have accompanied humans on the planet. Scientists have proven that humans infected with typhoid fever 200,000 years ago. It is important to know that the only host of this disease is a person just like polio, so it is possible - in theory - to control it, but the conditions of poverty and chaos hitting most parts of the world prevent this, and there is another important reason which is that there are more than a thousand types of Bacteria causing this disease, so developing sera in this direction is a difficult process

The most deadly epidemics in history


Smallpox

He appeared in the Roman Empire during these years 165-180
It is the first disease that humans triumph over. Smallpox has killed, maimed and caused blindness to millions of victims throughout its long history. Smallpox arises as a result of infection with a virus transmitted from infected to healthy people. A rash that resembles pimples appears on the patient's skin, and then a crust develops on the pimples, which will soon fall, leaving a scar in place. Smallpox has no cure. 20% of its victims die, the rest develop permanent deformities, and some people become blind. In 1796, English physician Edward Jenner prepared the first vaccination against smallpox. By the 1940s, smallpox had disappeared from Europe and North America. In 1967, the World Health Organization started a campaign to eliminate it. In 1977, the last smallpox infection appeared in Somalia; in 1980, the organization announced that it had successfully eradicated the disease

Yellow fever

It appeared in South America in 1648
It is a viral disease that is transmitted through certain types of mosquitoes. The yellow fever virus especially destroys the liver and kidney tissues. Symptoms include a decrease in the amount of urine and a cessation of the liver from performing its functions as it should. Classified with neglected tropical diseases

Yellow fever occurs as a result of a mosquito called the Egyptian mosquito. In most cases, the yellow fever virus from one person to another. When the mosquitoes bite an infected person or animal, the virus enters the body where it grows quickly and the mosquito bite after a period of nine to twelve days can cause yellow fever, as the mosquito can. Who became a carrier of the virus or microbe infection transmitted the disease for the remainder of her life

The most deadly epidemics in history


Measles

It appeared in 1657
It is an acute and infectious viral disease that affects children and causes some complications that are sometimes dangerous. Measles is one of the most common diseases in childhood in particular, but it may also affect adults. In 1963 AD, through a major breakthrough, a team of virologists, led by the American researcher / John Franklin Andrews, arrived at the production of an anti-measles vaccine. Symptoms include a high temperature accompanied by a cold, cough and ophthalmia, followed by a rash on all parts of the body. The first to know this disease and distinguished it from smallpox, the doctor and philosopher Abu Bakr Al-Razi, in Baghdad in the year 900 AD. Incubation period ranging between seven days and twenty-four days. The rash begins on the fourth day of fever, and after another four days, the heat begins to fall, followed by the formation of a bran-like crust. The source and store of measles infection are human. Measles is transmitted by spray and direct and indirect contact by contaminated objects. After recovery from measles, a person acquires lifelong immunity

Cholera

Sometimes known as Asian cholera or epidemic cholera, they are gastro-intestinal diseases caused by strains of Vibrio vibrio cholerae that produce enterotoxin. The virus is transmitted to humans by eating food or drinking water contaminated with Vibrio cholerae from other cholera patients. It has long been assumed that humans are the main reservoir of cholera, but there is ample evidence that aquatic environments can act as reservoirs of bacteria

The most deadly epidemics in history


Cholera vibrio is a gram-negative bacterium that produces cholera toxin, which is an intestinal toxin, which works to line the mucous membranes of the small intestine, and this process is responsible for this most prominent feature of the disease, depleted diarrhea. In its most severe forms, cholera is one of the fastest known killer diseases, and a healthy person's blood pressure may drop to levels of hypotension within an hour of the onset of symptoms of the disease; infected patients may die within three hours if no medical treatment is provided. In the common scenario, the disease progresses from liquid stools first to shock within 4 to 12 hours, supplementing death within 18 hours to several days, unless oral rehydration therapy is given (or intravenously, in more serious cases

Most of the cholera cases reported worldwide occur in Africa. It is estimated that most reported cholera cases are the result of poor surveillance systems, especially in Africa. Mortality is estimated at 5% of all cases in Africa, and less than 1% elsewhere


Ebola Virus Disease


The disease appeared in Sudan in 2004
It is a disease that affects humans and other primates caused by Ebola es. Signs and symptoms usually begin between two and three weeks after infection with the virus with a fever, sore throat, muscle pain, and headache. Then, vomiting, diarrhea, and rash usually occur, along with decreased liver and kidney functions. At this time some people begin to bleed both internally and externally. The disease has a high risk of death, killing between 25 and 90 percent of those infected, on average, about 50 percent. This is often due to low blood pressure from fluid loss, and usually follows 6-16 days after symptoms appear

The virus is spread by direct contact with fluids in the body, such as blood, in the infected person or other animals. This may also happen through contact with a substance recently contaminated with body fluids. The spread of the disease through the air among primates, including humans, has not been documented in any laboratory or under natural conditions. Semen or breast milk for a person after recovery from the Ebola virus disease may still carry the virus for several weeks or months. Fruit bats are believed to be the natural hosts of the disease and are able to transmit the virus without being affected by it. Other diseases such as malaria, cholera, typhoid fever, meningitis, and other viral hemorrhagic fever may be similar to Ebola virus disease. Blood samples are tested for viral RNAs, viral antibodies or the virus itself to confirm the diagnosis


After this quick review of some diseases that have appeared throughout history and killed man
Always man triumphed and life continues so there is no reason to panic because we will always triumph

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