Thu, 02 Apr, 2020

Pandemics that changed the course of human history

From the Black Death to HIV/AIDS to coronavirus, pandemics have afflicted civilisations throughout human history. Here are some of the major pandemics that have occurred over time

21st March 2020, 03:00 Hrs

Disease and illnesses have plagued humanity since the earliest days,  our mortal flaw. However, it was not until the marked shift to agrarian  communities that the scale and spread of these diseases increased  dramatically.

Widespread trade created new opportunities for human and animal  interactions that sped up such epidemics. Malaria, tuberculosis,  leprosy, influenza, smallpox, and others first appeared during these  early years. 

The more civilized humans became – with larger cities, more exotic  trade routes, and increased contact with different populations of  people, animals, and ecosystems – the more likely pandemics would occur.

Here are some of the major pandemics that have occurred over time:

Black Death (1346-1353)

Death Toll: 75 – 200 million

From  1346 to 1353 an outbreak of the Bubonic  Plague ravaged Europe, Africa,  and Asia, with an estimated death toll between 75 and 200 million  people. Thought to have originated in Asia, the Plague most likely  jumped continents via the fleas living on the rats that so frequently  lived aboard merchant ships. Ports being major urban centers at the  time, were the perfect breeding ground for the rats and fleas, and thus  the insidious bacterium flourished, devastating three continents in its  wake.


Three of the deadliest pandemics in recorded history were caused by a single bacterium, Yersinia pestis, a fatal infection otherwise known as the plague. 

The  Plague of Justinian arrived in Constantinople, the capital of the  Byzantine Empire, in 541 CE. It was carried over the Mediterranean Sea  from Egypt, a recently conquered land paying tribute to Emperor  Justinian in grain. Plague-ridden fleas hitched a ride on the black rats  that snacked on the grain. The plague decimated Constantinople  and spread like wildfire across Europe, Asia, North Africa and Arabia  killing an estimated 30 to 50 million people, perhaps half of the  world’s population. 

The Black Death, again hit Europe in 1347 killing with reckless abandon, claiming an astonishing 200 million lives in just four years.

And London never really caught a break after this as the plague  resurfaced roughly every 20 years from 1348 to 1665—40 outbreaks in 300  years. And with each new plague epidemic, 20 percent of the men, women  and children living in the British capital were killed. 

The Great Plague of 1665 was the last and one of the worst of the  centuries-long outbreaks, killing 100,000 Londoners in just seven  months. 

Flu pandemic (1918)

Death Toll: 20 -50 million

Between  1918 and 1920 a disturbingly deadly outbreak of influenza tore across  the globe, infecting over a third of the world’s population and ending  the lives of 20 – 50 million people. Of the 500 million people infected  in the 1918 pandemic, the mortality rate was estimated at 10% to 20%,  with up to 25 million deaths in the first 25 weeks alone. What separated  the 1918 flu pandemic from other influenza outbreaks was the victims;  where influenza had always previously only killed juveniles and the  elderly or already weakened patients, it had begun striking down hardy  and completely healthy young adults, while leaving children and those  with weaker immune systems still alive.

HIV/AIDS 

(at its peak, 2005-2012)

Death toll: 36 million

First identified in Democratic Republic of the Congo in 1976, HIV/AIDS has truly proven itself as a global pandemic, killing more than 36 million people since 1981. Currently there are between 31 and 35 million people living with HIV, the vast majority of those are in Sub-Saharan Africa, where 5% of the population is infected, roughly 21 million people. As awareness has grown, new treatments have been developed that make HIV far more manageable, and many of those infected go on to lead productive lives. Between 2005 and 2012 the annual global deaths from HIV/AIDS dropped from 2.2 million to 1.6 million.

Asian Flu (1956-1958)

Death Toll: 2 million

Asian Flu was a pandemic outbreak of Influenza A of the H2N2 subtype, that originated in China in 1956 and lasted until 1958. In its two-year spree, Asian Flu traveled from the Chinese province of Guizhou to Singapore, Hong Kong, and the United States. Estimates for the death toll of the Asian Flu vary depending on the source, but the World Health Organization places the final tally at approximately 2 million deaths, 69,800 of those in the US alone.

Hong Kong Flu (1968)

Death Toll: 1 million

A category 2 Flu  pandemic sometimes referred to as “the Hong Kong Flu,” the 1968 flu  pandemic was caused by the H3N2 strain of the Influenza A virus, a  genetic offshoot of the H2N2 subtype. From the first reported case on  July 13, 1968 in Hong Kong, it took only 17 days before outbreaks of the  virus were reported in Singapore and Vietnam, and within three months  had spread to The Philippines, India, Australia, Europe, and the United  States. While the 1968 pandemic had a comparatively low mortality rate  (.5%) it still resulted in the deaths of more than a million people,  including 500,000 residents of Hong Kong, approximately 15% of its  population at the time.

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