Many things in the world are actively attempting to kill us. Viruses are just particularly adept at it. Unfortunately, viruses are by far the most prevalent organisms on the plant, so this is terrible. In the end, the number of individual viruses on Earth exceeds the number of stars in the cosmos. The virus that causes COVID-19, SAR-CoV-2, may be the most well-known virus in recent times. COVID is not even close to the 320,000 viruses that infect mammals. What are some of the most lethal viruses that are still in use today?
5. Influenza
Each year the flue effect around One billion people globally and it result in up to 650000 deaths. While flu shot have been available since the 1930s. They only combat certain strain of viruses. Influenza is RNA based virus that replicate through RNA dependent RNA enzyme which do not have proofreading activity. So, mutation is common in its genome and person require flue shot each year.
Symptoms of influenza includes fever, chills, cough, muscle aches and fatigue.
4. Dengue
The virus that causes dengue fever is carried by mosquitoes. Annually, there are thought to be 3.9 billion infections. The typical symptoms of dengue fever include fever, headache, nausea, rash, and muscle discomfort. In some circumstances, it can also lead to dengue hemorrhagic fever or dengue shock syndrome, which can cause fatal bleeding, a sharp drop in blood pressure, and other complications. Despite the fact that the dengue vaccine has been authorized and is widely available, 40,000 individuals still pass away from the disease each year.
3. SARS-COV-2
It is a virus that fundamentally altered the world as we all knew it. It put a stop to travel, shut down hotels, restaurants, and shops, and collapsed the world economy. In November 2019, Wuhan, China, made the initial discovery of it. This virus is known to cause COVID-19, which has a 3.4% estimated death rate.
Symptoms include fever, cough and shortness of breath. To date, COVID-19 has killed more than 3.5 million people worldwide.
2. SARS-CoV
It has the mortality rate of 9.6%. The SARS-COV is the second most deadly on this list. It is a viral respiratory illness that was first identified in Asia in 2003. A total of 8090 people worldwide become sick with SARS during 2003 outbreak and out of these 774 died. However, no new case of SARS have been reported since early 2000s.
High fever, headache and pneumonia are the symptoms of this disease.
1. MERS-CoV
Virus discovered in 2012. MERS-CoV is the most lethal of the known coronaviruses that have been transferred from animals to humans. It causes fever, cough and shortness of breath. It has mortality rate of above 35%. It currently has no approved treatment or a vaccine, but fortunately, although human to human transmission is possible, but it is rare.
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