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The world’s top ten deadliest diseases


The world's top ten deadliest diseases


Malaria is an infectious disease caused by several species of protozoan parasites of the genus “Plasmodium” that are transmitted by the bite of infected mosquitoes. Malaria causes symptoms that typically include fever, headache, vomiting, and a characteristic pattern of coughing due to blood clots in the lungs. If not properly treated, severe cases can lead to coma or death. Malaria is an infectious disease that affects human red blood cells. 

Symptoms of Malaria

The most common symptoms are fever, headache, vomiting, and diarrhoea. Symptoms may be completely absent in 5 to 10% of infected people with non-immune system disorders such as sickle cell disease or on treatment with some medications, which include chloroquine or antimalarial agents commonly used for chemotrophic. 

Malaria Mortality Rate

It is estimated that around 1.4 million people die each year from malaria, and over 200 million cases of malaria occur every year worldwide. Taking into account the fact that malaria can be easily treated and cured with proper medication, this makes it a preventable disease that occurs mostly in developing countries where people live below the poverty line and cannot afford quality healthcare services.


The origin of tuberculosis is still unknown today. It is thought that the first case was in Egypt in 4000 BC during the Neolithic period. Most likely, humans were infected by cattle or other domesticated animals.  Tuberculosis has been known since antiquity, but its cause was identified only in 1882. The average time from infection to development of symptoms is between 2 and 3 months. For more than a century, it was accepted that the most likely source of contagion for tuberculosis was through the air (aerosol).

Symptoms of Tuberculosis

Tuberculosis (TB) is one of the most widespread and devastating infectious diseases in the world. The majority of cases occur in low-income countries, where TB can be fatal if left untreated. It has been estimated that more than 2 billion people are infected with the bacterium that causes tuberculosis (Mycobacterium tuberculosis or Mtb), but only 10% become sick.

Tuberculosis Mortality Rate

According to the World Health Organization, tuberculosis (TB) is a deadly infectious disease that affects people of all races and nationalities. In 2016, 10.4 million people fell sick with TB and 1.7 million individuals died from the disease [1]. However, there is good news for researchers on this front because a new study has been published in The Lancet Infectious Diseases journal regarding a TB vaccine candidate.


HIV/AIDS can be traced back to the first case of AIDS found in America. The individual who was believed to have the first case of AIDS was a Norwegian immigrant named Jonathon Mann, who died on June 5, 1969, in Manhattan. He had returned from Africa two years before his death after serving as a physician there. Jonathon Mann donated sperm to an infertility clinic run by Dr Chester Southam at St. Luke’s Hospital in New York City. Although the first known case of HIV occurred in 1959, public awareness about it didn’t begin until 1981. The first cases were reported among gay men living in New York City, Los Angeles, and San Francisco. During the 1980s, an estimated 1 to 2 million people became infected with HIV. In 1988, scientists developed a blood test that could detect antibodies if someone had been exposed to HIV within the previous six months. This test would alert health care workers so they could take steps to prevent further spread.

Symptoms of HIV/AIDS

The symptoms of HIV/AIDS can mimic other illnesses, such as common colds and flu, so it is important to get tested. There are good treatments today for people who are infected with HIV. With proper medical care, many people live healthy lives. However, they do need to take pills every day.


HIV/AIDS Death Rate

It is estimated that well over 100 million people have been infected with HIV, and more than 25 million people have died of AIDS-related illnesses. According to the 2013 UNAIDS report, about 35 million people were living with HIV at the end of 2012, representing an increase of almost 5 million since 2010. The number of new infections fell by nearly 21% between 2001 and 2011.

Diarrhoea and other water-borne diseases

Diarrhoea has afflicted mankind for millennia, and ancient civilizations were no different. The earliest evidence of this intestinal ailment can be found in what is now Iraq, among the ancient Mesopotamians. One of the first groups to write down their experiences with diarrhoea (and other water-borne diseases) was the Sumerians. Diarrhoea is characterized by loose, watery, or frequent stools. It is one of the leading causes of death among children all over the world. Contaminated water and food are common causes of diarrhoea and other intestinal diseases.

Diarrhoea and other water-borne disease symptoms

Bacteria and viruses contaminate water used for drinking, washing, and recreation. As a result, people can get sick from diarrhoea and other diseases caused by contaminated water. There are many causes of diarrhoea, such as poor sanitation conditions, bad hygiene practices, or germs that spread through food or drinks. Most of us know too well the symptoms of diarrhoea. While none are pleasant, dehydration is one of the most dangerous symptoms to experience because it can also cause other conditions like vomiting and rapid heartbeats.

Diarrhoea and other water-borne diseases have a high death rate.

 It’s expected to reach nearly 10 billion by the year 2050. With this growth comes an increase in health concerns and diseases, which can deteriorate rapidly in densely populated areas where hygiene is often overlooked. Preventing diarrhoea and other water-borne diseases will be important in maintaining global health. According to the Centers for Disease Control, 1.8 million people die each year from diarrhoea alone.

Respiratory Diseases

Respiratory diseases are a class of conditions that affect the respiratory system. Diseases such as asthma, COPD and lung cancer can be debilitating and even fatal if left untreated. The upper respiratory tract and the lower respiratory tract are the two parts of the respiratory system. Respiratory diseases can be infectious and non-infectious. Infectious diseases may be transmitted by: airborne droplets, direct contact with an infected person or animal, indirect contact such as touching a contaminated surface, or ingestion of contaminated food or water. Allergic reactions to certain substances such as pollen and dust may also cause respiratory symptoms.

Symptoms of Respiratory Diseases

The symptoms of this disease vary depending on the nature of the infection. The common cold is usually characterized by fever, sneezing and coughing. If it is caused due to a viral infection, then antibiotics will not be effective in treating or curing it. The most common respiratory diseases include asthma, emphysema and chronic bronchitis. Other less common conditions, such as interstitial lung disease and pulmonary hypertension, are also considered to be respiratory diseases.

Death by Respiratory Diseases

Respiratory diseases are the leading cause of death in children under 5 years old. These include pneumonia, acute lower respiratory tract infections (e.g., bronchiolitis, croup), and asthma. The World Health Organization (WHO) recently reported that the number of deaths from respiratory diseases has increased by more than 50% over the last two decades. According to WHO, approximately 6.2 million people die each year from chronic obstructive pulmonary disease (COPD), asthma, tuberculosis and lung cancer, including non-smokers.

Heart Disease and Stroke  (non-communicable)

Although heart disease and stroke are non-communicable diseases, they can be prevented. The World Health Organization (WHO) has developed an approach to preventing non-communicable diseases called the Integrated Management of Non-Communicable Diseases (IMNCD). It accounts for about 2% of all deaths in the country each year, and its prevalence is expected to rise by nearly 50% over the next ten years. As a result, public health experts are actively looking at ways to reduce stroke risk factors. A heart attack occurs when the blood flow is blocked in an artery that supplies blood to the heart muscle. The longer a region of the heart muscle is deprived of oxygen and nutrients, the greater the damage. A stroke occurs when an artery in or leading to your brain becomes blocked or bursts and causes bleeding inside your brain. 

Symptoms of Heart Disease and Stroke

It is important to understand the signs of heart disease and stroke.  Knowing what symptoms are, Sudden Dizziness or Fainting-There are different types of dizziness, but if you suddenly faint with no warning, it could be a sign of a stroke or heart attack…

Heart Disease and Stroke Death Rate

In the United States, heart disease and stroke are the leading causes of death. Each year, approximately 795,000 people die from heart disease and 585,000 people die from stroke. Heart disease is responsible for one in every four deaths in the United States each year, while stroke accounts for one out of every 18 deaths.


Cancer is a disease in which cells of the body grow uncontrollably, forming malignant tumours. It is often deadly, but modern treatments are making it more manageable. Cancer was first recorded in 1500 BCE as a category of divine punishment inflicted on humans, and later, Hippocrates used that metaphor for its spread through the body. The next major step forward was during 1656-1667 when Giovanni Borelli described the tumour’s capsule and Robert Hooke its microscopic structure. Cancer is a disease in which abnormal cells divide uncontrollably and spread to other parts of the body. Cancer can occur in almost any part of the body, although it most commonly occurs in the lungs, breast, prostate and colon in humans.

Symptoms of cancer

Cancers are caused by several factors, both genetic and environmental. Symptoms of cancer include unexplained weight loss, unusual bleeding or discharge from any body opening, persistent coughing or hoarseness that isn’t due to a cold or the flu, chronic indigestion or difficulty swallowing. It can affect almost any part of the body, including skin, blood, bone, muscle and other tissues. Cancer can be benign (not cancer), but it is often malignant (cancer). Malignant cancers grow into or invade nearby tissues and spread to other parts of the body through the lymphatic system or bloodstream.

Cancer Death Rate

The death rate of cancer is very high in developing countries. This is because there are no adequate facilities for diagnosing and treating these diseases. The people in these countries do not have any information on how they can protect themselves from cancer, nor do they have good access to health care providers who will help them get cured of the disease if they are stricken by it. The latest Health and Social Care Information Centre annual report indicates that cancer is responsible for more than 30% of all deaths in the UK. Despite recent improvements, cancer still remains one of the most common causes of death, with an average of 54 people dying from the disease every day.

Hepatitis B & C 

Hepatitis B has been around for thousands of years. The first known case was recorded in Egypt in 2600 BC when an Egyptian physician named Imhotep noted a strange illness afflicting workers in the limestone quarries. Later on, there were reports of outbreaks in ancient Greece and China. Hepatitis B and Hepatitis C are two types of hepatitis that can be transmitted through blood transfusions, organ donations and sexual contact. Both of these diseases cause inflammation in the liver, but they do it in different ways.

Hepatitis B is typically transmitted through unprotected sex with an infected individual (1). There can also be a vertical transmission from mother to child (2).  Hepatitis C is typically spread through contaminated equipment or instruments.

Symptoms of Hepatitis B & C

If you are suffering from one of the hepatitis B or hepatitis C viruses, then you must know about its symptoms. Symptoms are a way to find out if your body is infected with a given disease. It also helps doctors diagnose what is wrong with your body. Hepatitis can be caused by infection with viruses, bacteria, or parasites. Hepatitis C is a viral form of hepatitis that can lead to serious long-term health problems if it’s not treated.

Death Rates from Hepatitis B and C

Infection with the hepatitis C virus is a major global health problem. The virus causes inflammation of the liver, leading to chronic infection in 75% of those infected and eventually cirrhosis. In many areas, as many as 40% of the people have been exposed to hepatitis C. However, most recover from infections without symptoms or further complications. According to the World Health Organization, hepatitis B and C are among the world’s leading causes of death. “Death rate” means the number of deaths per year per 100,000 population. Hepatitis B is a liver disease that has an estimated global mortality rate due to cirrhosis (liver scarring) of about 1% per year. With over 350 million people infected, it is considered one of the most common serious viral infections worldwide. Chronic hepatitis can lead to liver cancer or liver failure.


Diabetes is a very common disease and has existed for thousands of years. The first recorded cases date back to around 2300 BC in Ancient Egypt, with one of the first mentions being found on the Ebers Papyrus, an Egyptian medical text written by a doctor named Akhty-Hotep. In the book, he discussed treating patients with diabetes mellitus by giving them honey and leading them to “drink plenty of water”. Diabetes is a chronic disease that causes problems with the way your body uses food for energy. 

Symptoms of diabetes

Diabetes is a chronic illness that causes high blood sugar, either because the body does not produce enough insulin or because cells do not respond to the insulin that is produced. Diabetes can lead to serious problems such as heart disease and stroke, kidney failure, nerve damage and blindness if left untreated. When you have diabetes, your pancreas does not make enough insulin or it can’t use its own insulin as well as it should. This causes sugar to build up in your blood instead of going into your cells. 

Diabetes Rate as of Today

According to new research, the death rate of people with type 2 diabetes who receive treatment is twice as high as those people who do not have any treatment. This study also showed that younger people with type 2 diabetes had a higher risk of death than older adults. A new study shows that diabetics have a higher death rate than the general population. Over a three-year period, researchers studied over one million people and discovered that diabetic patients died at a rate that was 24% higher than non-diabetic patients. The results of this study show an urgent need for increased education on diabetes prevention and management.

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