15 Deadliest Epidemics in HistoryJun 06, 2021
Oh fish, since the beginning of human
historyit has been known that many varieties of diseases and illnesses have been responsible for enormous numbers of human deaths. Many today wonder what the next great pandemic will be, but perhaps we should look to past pandemics to understand what the future will hold. may contain number 15 Ebola a very recent memory virus Ebola virus has caused several outbreaks all originating in Africa since 1976 the first level of Ebola epidemic began after an outbreak that began in Guinea just over a year ago in December 2013 after one year Child contracted Ebola at some point and passed the infection to family members caring for him since the initial infection in 2013.
Nearly 9,000 deaths have been attributed to the recent Ebola outbreak, a very small number when considered He realizes that influenza can cause around 500,000 deaths each year not to mention the fact that cases of the virus that spread to first world countries are incredibly rare and do not resurface. In widespread infections such as Ebola spread through contact with the bodily fluids of an infected person number 14 typhus epidemic of 1847 after the great potato famine in Ireland followed a mass exodus of immigrants from Ireland to the US in the At the time this happened, control of the disease was not yet in place and typhus, along with other diseases, spread at a very rapid rate via ships bound for the Americas.
The disease is transmitted very easily. The symptoms of typhus are much like those of the flu, but include a rash and delirium that eventually lead to death. the final death toll was around 20,000 people once the epidemic ended in 1848 number 13 the Great Plague of London most people will claim th in the Black Death it was the worst epidemic in
history, however most he is unaware that the bacterium that causes the plague, his seniya plague, still exists and causes small outbreaks of the plague today in the year 1665, an epidemic of the Black Death began to spread across London. mainly in the bubonic form of the plague and it killed about two thirds of those infected many people simply refer to the black plague as the bubonic plague but that is not necessarily correct as the black plague has three forms the other two are emmonak and septicemia which actually have higher death rates The Great Plague of London ended with nearly a quarter of London's population dead after just one year This equates to around 100,000 deaths, making it the fourth worst epidemic caused by Yersinia pestis number 12 2009 swine flu pandemic also known as h1n1 swine flu has actually caused two pandemics and one epidemic in the last century as it turns out swine flu actually spread from pigs to many humans Some of you may remember the swine flu pandemic that occurred just a few years ago in 2009 and the subsequent fear that arose around the spread of the flu. but it doesn't seem to have turned out too bad, how many people did you know who actually got the virus or even died from it?
Well, you'll know exactly why it was a problem when I talk about the Spanish flu later. i just know there was a reason to worry in the end swine flu claimed 285 thousand lives mainly in India and Asia number 11 the Great Plague of Milan remember how I said the Great Plague of London was the fourth worst epidemic of the Black Death. well, the plague that swept through Milan, Venice, Florence and Verona in 1629 to 1631 was the third worst. The 30 Years' War was ongoing during the time the plague swept through Italy as Venetian troops withdrew to northern Italy. and central Italy spreading the plague many had been infected with during the war, however Milan had some effective health measures such as quarantine but once carnival season came the relief measures were relaxed and the plague swept through the city like wildfire in 1631 almost 1 million lives have been claimed by the plague cementing it as the third worst plague caused by Yersinia pestis number 10 the Hong Kong flu in 1968 an antigenic shift occurred in the h2n2 virus that caused the asian flu outbreak and spawned h3 in if you're anything like me antigenic shift makes you think of a mutating virus like what you've read about in zombie fiction that's not exactly the case, Although you ever wonder what happens when a virus encounters the DNA of another virus in a cell, apparently some viruses have the terrifying ability to reassemble into a new virus strain if they encounter one.
A person who has already been infected with a similar virus, some poor soul in Hong Kong was infected at the wrong time. ng time and began spraying the new h3n2 strain in a rapidly growing city, causing the virus to spread across Asia and the world in just under a year. 1 million lives were claimed by h3n2 in just over a year and the virus is now a common seasonal strain. of influenza number 9 the Russian flu also known as the flu pandemic of 1889 to 1890 the Russian flu was the first documented deadly strain of influenza A that began to spread in Russia and China in the year 1889 but managed to spread rapidly to other parts of the world In addition, the strain of influenza that caused the virus is currently unknown, and it is theorized that both H 2 n 2 and H 3 y 8 are to blame, in any case, this strain of influenza spread rapidly due to the lack of public health measures around the world and reached peak mortality within five weeks after the first initial case.
The elderly were the largest population group affected by the virus, although even those of royal blood died, including Queen Victoria's grandson, Prince Albert Vict. o in just one year the influenza strain killed over 1 million people with several returns of the virus seen in the next decade number 8 the asian flu getting tired of hearing influenza still haha thats too bad in 1956 the second worst outbreak of a influenza virus occurred this time in the form of h2n2 true to its moniker the asian flu started in china's Providence guinea pig the virus is suspected to have formed due to an antigenic shift after wild ducks infected and the unfortunate human h2n2 started nearby Since the end of the in 1956 and had spread throughout the world by June 1957, millions were infected with the easily spread virus and, unfortunately, public health measures at that time were not the best.
A vaccine was actually produced in 1957 to contain the virus and implemented to some success, but by the time the pandemic ended in 1958, an estimated 1-4 million deaths had occurred worldwide from 7 cholera pandemics. strangely not washing hands after using a toilet and disposing of human waste directly into untreated rivers and oceans where shellfish can pick it up and spread cholera was a very bad idea unlike many other diseases cholera only causes disease in humans. it is a rod-shaped bacterium that causes instant intestinal discomfort upon ingestion since 1816 there have been seven major pandemics in total in which millions of people became infected and died awareness of the disease was so poor during early outbreaks that there were even city notices instructing people to avoid drinking boiled water and even eating raw fruits and vegetables we have come a long way the death toll from cholera is estimated to be 40 to 50 million people that is the current population of South Korea number 6 HIV and AIDS What makes HIV so scary is the speed with which it spread through a developed country like the United States.
HIV is a small retrovirus that infects helper T cells. ding to AIDS when T-cell levels begin to drop when the number of T-cells in the body drops to critical levels the bacteria it was easily defended against take over the body It is theorized that HIV arose when an SIV retrovirus spread a lot weaker to humans in the late 1950s no, that doesn't mean that SIV was the result of a romantic pairing between a primate and a human, it's most likely due to two fluids getting into a wound that caused that pesky antigenic shift. AIDS was the number one cause of death in the US.
From 1994 to 1995, with 1.2 million deaths recorded in the United States alone and in the rest of the world, between 15 and 45 million people are believed to have died as a result of AIDS, many of them children infected at birth number five Justinian's plague, here we are in the first terrible pandemic in history caused by that little rascal who never wants to stay under his sania pestis. The Byzantine Empire was currently in the midst of warfare and expansion and therefore needed food for its people, so grain was imported from Egypt. unfortunately rats infected with fleas carrying the black plague also traveled with the grain, to make a long story short, the plague spread to the Mediterranean in 541 and wiped out 25 percent of the people who lived there, which made up between 25 and 30 million people Emperor Justinian the first was actually infected with the disease but managed to survive but still the plague got his name because he was ruling at time number 4 the S Spanish flu I promise this is the last time I will speak about the flu.
Remember I said earlier that there was reason to worry about swine flu. Well, this is why the world population in 1918 was just under 2 billion people. Spanish flu. infected 500 million of those people, which means that more than 1/4 of the world's population was infected with the virus Between 50 and 100 million people died due to h1n1, the same virus strain as swine flu, which it made up between 2.5 and 5 percent of the world's population at the time, but why was this virus so deadly? Well it was actually deadly for people in their 20s and 30s when the immune system is at its strongest, that doesn't really seem to make sense unless you know that people infected with the virus went through a cytokine storm which is essentially a breakdown of your immune system the healthier you were the more life threatening h1n1 was again number three the Black Death the Black Death the bubonic plague the worst epidemic in living memory. ber learning in school everyone has heard of the Black Death, as well as the death and destruction it brought to Europe.
The bubonic plague is the more familiar form of the disease that causes the black, necrotic skin we are so used to hearing about. the transversal point how about I let the Italian Renaissance writer Giovanni Boccaccio describe it in men and women alike? It was first betrayed by the appearance of certain tumors in the groin or armpits, some of which grew as large as a common apple, others like an egg, from the two said parts of the body. This deadly cavity soon began to spread and spread everywhere. directions indifferently after which the shape of the disease began to change those tumors he spoke of were actually swollen lymph nodes and filled with pus yeesh 75 to 100 million people equaling 30 to 70 percent of Europe died due to to the black plague number two plagues of native americans many of you learned in your history class that native americans were e heavily impacted by western civilization as soon as contact was made with most deaths occurring in native populations Due to old world diseases like smallpox that were brought to America by explorers, smallpox is a virus of l to smallpox, which generally has a mortality rate of around 30 percent, but was accompanied by other viruses and diseases when it arrived in the Americas.
It is estimated that in 1492 there were between 20 and 100 million Native Americans, but by 1650, the population had dwindled to just 6 million. 90 percent of all Native Americans die due to diseases they have never experienced before number one malaria the first human bones we can find have traces of malaria present when analyzed meaning that since malaria existed it was already infecting primates malaria infects 125 to 300 million people today with 3.2 billion people at risk of contracting it, malaria can kill more than 1 million a year, most of th Victims are children under the age of 10 . This makes malaria an annual pandemic that infects almost 5% of the world's population because malaria kills mainly children.
Some scientists have estimated that malaria has killed half of all the people who have ever lived anywhere. more than 50 billion of the 108 billion people that have ever existed all forms of malaria are caused by a parasite called Plasmodium of which there are several species that cause varying degrees of symptoms the life cycle of the plasmodia causes it to infect the human liver cells and then red blood cells where it reproduces and is then picked up by certain mosquitoes that further spread malaria there is no vaccine for malariamalaria as the nature of the parasite makes it extremely difficult to deal with such smallpox and polio have been nearly eradicated malaria the
deadliestpandemic of all time still results in the deaths of almost a million children each year.
See in a nutshell for more information. information about how the immune system works until the next video bye
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