What are the most dangerous computer viruses?

Most dangerous computer viruses

There are many different types of computer viruses, and the most dangerous ones are usually the ones that are the most difficult to detect and remove. Some of the most dangerous viruses include:

Trojan Horses: These viruses masquerade as legitimate programs or files, and trick users into downloading and executing them. Once installed, Trojans can give attackers complete control over the infected computer.

Spyware: This type of virus is designed to collect sensitive information from the infected computer, such as passwords, financial data, and personal information. Spyware can also be used to track a user’s online activities.

Adware: Adware is a type of virus that displays annoying or intrusive advertising on the infected computer. In some cases, adware can redirect a user’s web browser to malicious websites that can infect the computer with other types of malware.

Rootkits: Rootkits are programs that allow attackers to gain hidden, administrator-level access to an infected computer. Rootkits can be used to install other types of malware, such as spyware and adware, on the infected computer.

Ransomware: Ransomware is a type of virus that encrypts a user’s files and demands a ransom be paid in order to decrypt them. Ransomware is usually spread through email attachments or by downloading infected files from malicious websites.

Email Viruses: Email viruses are viruses that are spread through email attachments or by opening infected email messages. Email viruses can infect a computer without the user even knowing, and can be used to collect sensitive information or spread other types of malware.

Viruses are constantly evolving and becoming more sophisticated, so it is important to have a good antivirus program installed on your computer and to keep it up-to-date..More information

20 years of the most dangerous viruses

It’s been 20 years since the world’s deadliest viruses first made headlines. In that time, we’ve seen new viruses emerge and old ones mutate into more deadly strains. Here’s a look at the 20 most dangerous viruses of the past 20 years.

1. SARS

SARS, or severe acute respiratory syndrome, is a viral respiratory illness that first emerged in China in 2002. The illness caused severe pneumonia-like symptoms and, in some cases, death. In just a few months, the virus had spread to more than two dozen countries. Nearly 800 people died from SARS before it was eventually contained.

2. Avian Influenza

Avian influenza, commonly known as bird flu, is a type of influenza that infects birds. A particularly deadly strain of the virus, known as H5N1, emerged in 1997 and began killing chickens, ducks, and other birds in Asia. The virus eventually began infecting humans, causing a handful of outbreaks in Asia, Africa, and Europe. While the virus has not yet caused a global pandemic, it has killed hundreds of people and continues to pose a threat to public health.

3. Ebola

Ebola is a deadly virus that causes hemorrhagic fever. The virus is spread through contact with the blood or body fluids of infected animals, or through contact with the bodies of people who have died from the virus. Ebola outbreaks have occurred sporadically in Africa since the 1970s, but the most recent and largest outbreak began in 2014. The outbreak, which is ongoing, has killed more than 11,000 people and continues to spread.

4. Marburg

Marburg is a virus similar to Ebola that causes hemorrhagic fever. The virus is spread through contact with the blood or body fluids of infected animals, or through contact with the bodies of people who have died from the virus. Marburg was first identified in 1967, when outbreaks of hemorrhagic fever occurred in Germany and Yugoslavia. The virus has since caused sporadic outbreaks in Africa. The most recent outbreak began in Angola in 2005 and killed more than 280 people.

5. HIV/AIDS

HIV, or human immunodeficiency virus, is a virus that attacks the immune system. HIV is primarily spread through sexual contact or contact with contaminated blood. Once a person is infected with HIV, they may go on to develop AIDS, or acquired immune deficiency syndrome. AIDS is a debilitating and often deadly disease that currently has no cure. HIV/AIDS has killed more than 35 million people since it was first identified in the early 1980s.

6. Hantavirus

Hantavirus is a virus that is spread through contact with rodents, specifically their urine, droppings, or saliva. The virus can cause severe respiratory illness and, in some cases, death. Hantavirus was first identified in the early 1990s, when outbreaks of respiratory illness were reported in the southwestern United States. The virus has since been identified in other countries, including Canada, Japan, and Chile.

7. West Nile Virus

West Nile virus is a virus that is spread through the bite of an infected mosquito. The virus can cause mild flu-like symptoms, or it can lead to more serious illnesses, such as meningitis or encephalitis. West Nile virus was first identified in the late 1990s, when it began causing outbreaks of illness in Africa. The virus eventually spread to Europe, the Middle East, and the Americas. To date, West Nile virus has sickened more than 1.5 million people and killed more than 25,000.

8. Japanese Encephalitis

Japanese encephalitis is a virus that is spread through the bite of an infected mosquito. The virus can cause inflammation of the brain, or encephalitis. Japanese encephalitis is a serious and sometimes fatal illness. The virus is most common in Asia, where it is estimated to cause 10,000 to 20,000 cases of encephalitis each year.

9. Dengue Fever

Dengue fever is a virus that is spread through the bite of an infected mosquito. The virus can cause severe flu-like symptoms, as well as potentially fatal hemorrhagic fever. Dengue fever is most common in tropical and subtropical regions of the world. Outbreaks of the disease often occur following heavy rains or floods, when mosquito populations multiply.

10. Yellow Fever

Yellow fever is a virus that is spread through the bite of an infected mosquito. The virus can cause severe flu-like symptoms, as well as potentially fatal hemorrhagic fever. Yellow fever is most common in Africa and South America. The virus is considered endemic in many parts of these continents, meaning it is always present in the environment and outbreaks can occur at any time.

11. Typhus

Typhus is a bacterial infection that is spread through the bite of an infected flea. The illness can cause fever, rash, and, in some cases, death. Typhus is most common in areas where there is inadequate sanitation and crowded conditions. Outbreaks of the disease often occur following natural disasters, such as earthquakes or floods.

12. Cholera

Cholera is a bacterial infection that is spread through contaminated food or water. The illness can cause severe diarrhea and dehydration, and can be fatal if not treated quickly. Cholera is most common in areas with poor sanitation and limited access to clean water. The disease often occurs following natural disasters or periods of conflict, when sanitation conditions deteriorate.

13. Plague

Plague is a bacterial infection that is spread through the bite of an infected flea. The illness can cause fever, chills, and, in some cases, death. Plague is most common in Africa, Asia, and South America. The disease often occurs in rural areas, where it can spread quickly through rodent populations.

14. Rift Valley Fever

Rift Valley fever is a virus that is spread through the bite of an infected mosquito. The virus can cause severe flu-like symptoms, as well as potentially fatal hemorrhagic fever. Rift Valley fever is most common in Africa, where it occurs sporadically. The disease is also present in the Middle East and South Asia.

15. Lassa Fever

Lassa fever is a virus that is spread through contact with contaminated food or water. The virus can cause severe hemorrhagic fever, and is fatal in up to 80 percent of cases. Lassa fever is most common in West Africa, where it occurs sporadically. The disease is also present in East Africa and the Middle East.

16. Kyasanur Forest Disease

Kyasanur forest disease is a virus that is spread through the bite of an infected tick. The virus can cause severe hemorrhagic fever, and is fatal in up to 30 percent of cases. Kyasanur Forest disease is most common in India, where it was first identified in the 1950s. The disease is also present in Sri Lanka, Pakistan, and Afghanistan.

17. Crimean-Congo Hemorrhagic Fever

Crimean-Congo hemorrhagic fever is a virus that is spread through the bite of an infected tick. The virus can cause severe hemorrhagic fever, and is fatal in up to 40 percent of cases. Crimean-Congo hemorrhagic fever is most common in Africa, where it occurs sporadically. The disease is also present in the Middle East, Asia, and Europe.

18. Nipah Virus

Nipah virus is a virus that is spread through contact with infected bats or pigs. The virus can cause severe respiratory illness, and is fatal in up to 75 percent of cases. Nipah virus is most common in Bangladesh, where it was first identified in the 1990s. The disease is also present in India, Malaysia, and Pakistan.

19. Middle East Respiratory Syndrome

Middle East respiratory syndrome, or MERS, is a viral respiratory illness that first emerged in Saudi Arabia in 2012. The illness causes severe pneumonia-like symptoms and, in some cases, death. MERS has sickened more than 1,600 people and killed more than 600. The virus is most common in Saudi Arabia, but cases have also been reported in other countries in the Middle East, Africa, Asia, and Europe.

20. Zika Virus

Zika virus is a virus that is spread through the bite of an infected mosquito. The virus can cause mild flu-like symptoms, as well as potentially serious birth defects. Zika virus is most common in Africa, where it was first identified in the 1950s. The virus is also present in Asia, the Americas, and Oceania.

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