The ten most dangerous viruses in the world caused havoc before Corona.
1. Rota Virus
Rotavirus is also called the child killer virus. It kills about 5 lakh children every year around the world. It causes fatal diarrhea in newborns and children between the ages of 6 and 8 years. Due to which many times, the lives of children are lost.
2. Small Pox
Smallpox has killed more people globally (30 to 500 million deaths) than any other virus. Because of this virus's R0 (it is read R-naught), the reproduction number is between 3.5 and 6. That is, one person infected with this virus can infect 3 to 6 people. Its fatality red is 90 percent. However, this virus has now been completely eradicated from the world through vaccination.
3. Measles
Measles is commonly known as measles disease. In the last 150 years, it has killed about 20 crore people. According to old records, it used to kill about 2 lakh people every year. However, now, this virus has been controlled through vaccination. But the worst part in the case of measles is that a person infected with this virus can infect 12 to 18 people.
4. Dengue
Dengue virus is spread through the bite of mosquitoes. This virus has been found in 110 countries of the world and every year infects about 100 million people, out of which about 20 thousand people die. People who catch this virus again often reach severe conditions.
5. Yellow Fever
When yellow fever is very severe, blood starts coming from his nose, eyes, mouth, and stomach. About 50 percent of the patients who reach this condition have to lose their lives within 7 to 10 days. Even today, yellow fever infects about 2 lakh people worldwide and kills about 30 thousand people.
6. Flu or Influenza
Every year around 5 lakh people die due to the flu. In the most dangerous flu pandemic (Pandemic is the disease that engulfs a large part of the world.) The Spanish flu killed 5 to 100 million people. It is considered the most dangerous flu pandemic ever.
7. Rabies
Rabies has been considered a hazardous disease since ancient times. Rabies can also be transmitted by the bite or nail-biting of a bat or dog. Every year 60 thousand people die from this disease worldwide. Most of these deaths occur in Africa and Asia.
8.Hepatitis-B&C
Hepatitis B kills about 7 lakh people every year. Currently, it is counted among the most dangerous diseases. It attacks the liver first, causing liver cancer or liver damage. Liver damage in this disease is permanent, which cannot be cured by treatment. Hepatitis C kills about 3.5 million people in the world every year.
9. Ebola and Marburg Virus
Ebola and Marburg viruses are among the most dangerous viruses in the world today because no concrete treatment or vaccine has been invented for them yet. At the same time, the fatality rate of these viruses is up to 90 percent. The symptoms of these two viruses are almost the same. After getting infected with them, a person receives problems like hemorrhagic fever, organ failure.
10. HIV AIDS
According to experts, at present, about 40 million people worldwide have HIV. According to an estimate, every year for the last 30 years, about 20 lakh people have lost their lives due to this disease. So far, about 2.5 crore people have died due to this disease.
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