Top 10 Deadliest Diseases

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One of the most tragic parts of being human is being afflicted by diseases with high morbidity and mortality. Here is our list of top 10 deadliest diseases ever known to man.

 

1. AIDS; 25 million from 1981 to present
aids

AIDS is a mix of infections and complications as a result of progressive damage to the body’s immune system caused by HIV. AIDS is now considered a pandemic.

 

2. Influenza; 36,000 deaths annually
influenza

Influenza, which is more commonly known as flu, is a highly infectious disease that is caused by influenza virus. Transmission of the disease is by airborne and through physical contact.

 

3. Spanish Flu, 1918-19; 100 million deaths
spanish_flu

The flu pandemic that happened in 1918 is termed as a category 5 flu pandemic which was caused by the flu virus strain A with subtype H1N1.

 

4. Bubonic Plague; 250 million deaths
bubonic-plague

This disease outbreak was mainly caused by fleas and rodents infected with Xenopsylla cheopsis. Humans were infected after being bitten by an affected rodent.

 

5. Malaria; 2.7 million deaths annually
malaria

Malaria is an infectious disease which is vector-borne. The causative agent is the protozoan parasites. It is a common disease in the sub-tropics and tropical regions.

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  • Wenxin

    The Bubonic plague was actually caused by bacteria species Yersinia Pestis.

  • max

    oil eating bacteria causes AIDS comes in capsule.

  • medic

    Bubonic Plague and “Black Death” are the same disease. As mentioned, it’s caused by Yersinia pestis.

    max is wrong. AIDS is not caused by any species of bacteria (capsule-forming or otherwise). It is caused by a retrovirus known as the HIV virus.

    The Sweating Sickness ran through England in three separate epidemics each several years apart. One scary part of this disease is that in addition to it killing extremely fast (within hours), to this day, scientists cannot figure out what pathogen caused the disease. The pathogen could still exist somewhere in the modern world or it could have been erradicated through hygiene, sanitation, or vaccination without us realizing it was the “Sweating Sickness” of the Middle Ages that we were erradicating. We may never know.

  • medic

    One other insteresing fact:

    The Spanish Flu of 1918 was the H1N1 virus.

    We saw the H1N1 virus again in 2009 when it was labeled “Swine Flu”.

    A side note: H1N1 also ran a brief course through Russia in 1977 but was mild in severity as most people over 20 years old at the time had already built up immunity to it through exposure to similar viruses in the 1950′s.

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