What is the deadliest virus in history?

What’s the worst virus in history

1. The Black Death: Bubonic Plague. The Black Death ravaged most of Europe and the Mediterranean from 1346 until 1353. Over 50 million people died, more than 60% of Europe's entire population at the time.

What disease caused the most deaths in history

By death toll

Rank Epidemics/pandemics Death toll
1 Black Death 75–200 million
2 Spanish flu 17–100 million
3 Plague of Justinian 15–100 million
4 HIV/AIDS epidemic 42 million (as of 2023)

What was the worst virus in United States history

The Worst Outbreaks in U.S. HistorySmallpox.Yellow fever.Cholera.Scarlet fever.Typhoid Mary.1918 H1N1.Diphtheria.Polio.

What are different types of diseases

The flu, measles, HIV, strep throat, COVID-19 and salmonella are all examples of infectious diseases. Cancer, diabetes, congestive heart failure and Alzheimer's disease are all examples of noninfectious diseases.

Who was the first virus

Tobacco mosaic virus

Abstract. Two scientists contributed to the discovery of the first virus, Tobacco mosaic virus. Ivanoski reported in 1892 that extracts from infected leaves were still infectious after filtration through a Chamberland filter-candle.

How old is virus on earth

Scientists believe they are at least as old as the first cells, which emerged around 4 billion years ago, but viruses could be even older, existing in the precellular world as self-replicating entities that subsequently evolved into forms that parasitize other cells.

What are the worst viruses

The deadliest viruses in historyMarburg virus.Ebola virus.Rabies.HIV.Smallpox.Hantavirus.Influenza.Dengue.

What disease killed the fastest

The world's fastest killer is ischaemic heart disease, responsible for 16% of the world's total deaths.Cerebrovascular diseases such as stroke are also extremely fatal within minutes of their onset.

What was the first virus ever

Tobacco mosaic virus

Abstract. Two scientists contributed to the discovery of the first virus, Tobacco mosaic virus. Ivanoski reported in 1892 that extracts from infected leaves were still infectious after filtration through a Chamberland filter-candle.

Does the virus still exist

There are still circuses in the US that operate today.

Some of these circuses include Loomis Bros Circus, Jordan World, Carden International, Royal Hanneford, and Carson & Barnes.

Is Ebola a disease or virus

Ebola virus disease (EVD), formerly known as Ebola hemorrhagic fever, is a rare but severe, often fatal illness in humans. The virus is transmitted to people from wild animals and spreads in the human population through human-to-human transmission.

What diseases have no cure

dementia, including Alzheimer's disease. advanced lung, heart, kidney and liver disease. stroke and other neurological diseases, including motor neurone disease and multiple sclerosis. Huntington's disease.

Which virus is the smallest virus

Adenovirus is the smallest virus and Mycoplasma is the smallest bacteria. Both bacteria and viruses are contagious organisms that lead to many diseases in both plants and animals.

How was the first virus born

Virus-first hypothesis: Viruses evolved from complex molecules of protein and nucleic acid before cells first appeared on earth. By this hypothesis, viruses contributed to the rise of cellular life. This is supported by the idea that all viral genomes encode proteins that do not have cellular homologs.

Is the iloveyou virus still around

Although the ILOVEYOU virus is no longer active, it serves as an example of how quickly malicious code can spread across the internet and cause widespread damage. Additionally, it highlights the importance of being aware of cyber threats and taking steps to protect yourself from them.

Who created the iloveyou virus

Onel de Guzman

Common name ILOVEYOU
Point of origin Manila, Philippines
Author(s) Onel de Guzman
Operating system(s) affected Windows 9x, Windows NT 4.0, Windows 2000
Written in VBScript

What was the 1st deadliest disease

1. Bubonic Plague. Bubonic Plague is a potentially fatal infectious disease caused by the bacterium, Yersinia pestis. Throughout centuries, the disease has erupted several times in different eras, claiming between ten and millions of lives worldwide.

Which disease led to death

The top global causes of death, in order of total number of lives lost, are associated with three broad topics: cardiovascular (ischaemic heart disease, stroke), respiratory (chronic obstructive pulmonary disease, lower respiratory infections) and neonatal conditions – which include birth asphyxia and birth trauma, …

What are the past viruses like COVID

The sources for seven major pandemics include:1918 and 2009 influenza (H1N1): zoonotic influenza virus from pigs in 1918 and 2009.Avian influenza A (H5N1 and H7N9): zoonotic influenza virus from birds and poultry.Bubonic plague: Yersinia pestis, a zoonotic bacteria found in fleas and small mammals.

How did Covid-19 became a virus

COVID-19 Origins

Myth: COVID-19 was created in a lab. Fact: Scientists are still looking into the origin of COVID-19, but they do know it's unlikely that someone made it in a lab. Based on studies of other coronaviruses, they think the virus may have started in bats and evolved to infect humans.

Is Ebola painful

Primary signs and symptoms of Ebola disease often include some or several of the following: Fever. Aches and pains, such as severe headache and muscle and joint pain.

Can Ebola survive

Ebola virus that is dry on surfaces, like doorknobs and countertops, can survive for several hours; however, virus that is on surfaces in body fluids, like blood, can live longer.

What are the 7 killer diseases

World's deadliest diseases: 7 diseases that impacted human historyBubonic Plague.Spanish flu or Influenza.Smallpox.Cholera.HIV/AIDS.Ebola.Coronavirus.

What is the hardest disease to cure

Cancer. Cancer refers to the uncontrolled growth of abnormal cells in the body. This can affect almost any organ or tissue including lungs, breast, colon, skin and ovaries. Due to the complexity of the disease and the variety of forms it can take, developing a cure has proven difficult.

How big is the biggest virus

1.5 microns

The physically largest virus is Pithovirus sibericum, at 1.5 microns (or 1,500 nanometers) in length [2]. Though that might seem tiny, it is larger than some bacteria, and approximately half the width of a strand of spider web silk [3].