10 World’s Most Deadly Diseases and their Risks

The world’s most deadly diseases are the ones that progress slowly. Many fast acting diseases that grab the headlines often are not on the list.

The fact that may surprise you is that most diseases on the deadly list can be prevented partially. Still, those diseases exist and the reason is not having access to preventive healthcare.

The World Health Organization listed the most deadly diseases to make people aware of the risks and preventive measures to be taken against them.

Coronary Artery Disease

The blood flow gets affected when the blood vessels become narrowed. This results in coronary artery disease which is known to be deadliest disease of all. Heart failure and chest pain can also happen in case of leaving the condition untreated.

Risk Factors

The risk factors include high cholesterol, high blood pressure, smoking, diabetes, and family history of coronary artery disease. Having more of these factors increase your risk of having the disease.

How to Prevent Coronary Artery Disease?

Awareness about the disease has made preventive measures common. People prone to having the disease can follow certain steps for maintaining overall health. The steps include health weight management, regular exercise, well balanced diet, moderate drinking, and avoiding smoking.


A stroke is the result of blockage of an artery in your brain. The brain cells begin to die when they do not get enough oxygen. This may make you feel numb and confused.

You may also have long term disability if the condition is left untreated. It is recommended to avoid any delays of more than 3 hours to prevent disability.

Risk Factors

Stroke risk is increased if you have a family history and high blood pressure. Also, the risk is higher if you smoke and take oral cobtraceptives. Being a female or African-American also increases the risk.

How to Prevent Stroke?

The risk can be reduced significantly by adopting a healthier lifestyle and diet. Medications and surgery are also available to decrease the risk of stroke. The methods of prevention to be chosen depend on an individual’s condition.

Respiratory Infections

The airways and lungs can get infected because of various causes. Influenza, flu, bronchitis, pneumonia, and tuberculosis are all reasons for the lower respiratory infections. You may feel symptoms including cough, breathlessness, wheezing, and tightness of the chest.

Although it may not sound severe, leaving the condition untreated can cause death because of breathing difficulties.

Risk Factors of Respiratory Infections

You may have increased risk of respiratory infections if you are frequently exposed to lung irritants, smoke, have flu, have a week immune system, asthma, or HIV.

How to Prevent Respiratory Infections

It is important to take steps in order to minimize the risk of lung infection. A flu shot is recommended annually to avoid such infections.

It is also advised to wash hands with soap and water to avoid bacteria from entering the mouth. Moreover, try to take plenty of rest to heal the symptoms of infection as it would speed up recovery.

Chronic Obstructive Pulmonary Disease

Chronic obstructive pulmonary disease is more worse than the typical lung infection. It can make breathing difficult and progresses to damage lungs.

Risk Factors

Smoking, lung irritants, and family history of chronic obstructive pulmonary disease. The risk increases even if you had respiratory infection as a child.

How to Prevent Chronic Obstructive Pulmonary Disease

Medication can be used to slow down the progression of infection as it cannot be treated completely. Avoiding smoking and second hand smoke for all reasons can save your life. It is better to get yourself treated sooner than later to save more trouble and avoid increased risks.

Lung Cancer

Trachea, larynix, and bronchus are types of respiratory cancers. The lungs get affected mainly because of smoking. Second hand smoking is extremely dangerous for your health too. Moreover, environmental toxins and pollution also contribute to the damaging health of lungs.

The Asian countries are still using coal as a fuel for cooking. The emissions account for deaths every year.

Risk Factors

Although smoking and tobacco use is the main cause of respiratory cancers, environmental factors also play their role. Fuel emissions are hazardous for health as you inhale the toxins

How to Prevent Respiratory Cancers?

It is best to avoid exposure to toxic fumes in the environment. Also, avoid using tobacco as it only damages your lungs. Although you may reduce the symptoms with early diagnosis, there is still not much that can be done for preventing respiratory cancers.

Diabetes Mellitus

Diabetes is a condition that affects the production of insulin and its usage in the body. The cause for type 1 diabetes is still not known whereas type 2 diabetes is caused by poor lifestyle. The causes can be worked upon to prevent type 2 diabetes as it has become one of the world’s leading causes for deaths.

Risk Factors

The risk factors of diabetes are lack of exercise, lack of nutrition, high blood pressure, old age, and unhealthy weight. Most of the factors can be worked upon to achieve healthier targets. You can certainly control or manage the symptoms of diabetes with determination.

How to Prevent Diabetes?

Diabetes cannot always be prevented as family history intervenes too. However, regular exercise and healthy diet full of nutrition can help you manage your condition very well. Fiber is also good for fighting off diabetes as it controls blood sugar levels.

Alzheimer’s Disease

Alzheimer’s disease is often only linked to memory loss whereas it has deadly effects on life as well. It is a deadly disease which progresses to affect mental functions ultimately destroying them. The disease has powerful effects on your thinking and reasoning ability.

Risk Factors

Alzheimer’s disease is likely to affect people over the age of 65. It is also inheritory which comes in your genes to cause various symptoms at any age. Unhealthy lifestyle also contributes to the disease and its symptoms.

Moreover, down syndrome, previous head trauma or injury, being female, or having a family history are all factors that increase the risk of Alzheimer’s disease.

How to Prevent Alzheimer’s Disease

Researchers are still in search of ways to prevent the disease. The exact reason is still not known although you may adopt a healthy lifestyle to combat many health risks.

A heart friendly diet can help you have full nutrition. Fruits, vegetables, low fat meat and dairy, olive oil, fish, and organic sources of protein are all part of a healthy and nutritious diet.


Passing runny stools more than twice a day is a condition called diarrhea. Diarrhea causes fluid loss from the body leaving you dehydrated. Losing water and salt can be bad for your health as severe dehydration can become a cause of death.

Risk Factors

Contaminated water or food is the most common cause of diarrhea. Poor sanitary conditions, and no access to clean water is also increasing diarrhea cases every year. Moreover, malnutrition and a weak immune system can also make diarhhea to affect your health more often.

How to Prevent Diarrhea?

Prevention of diarrhea is possible by practicing good hygiene. Improving the quality of water and sanitization can can be the first steps towards bettee health. Also, people should be given access to medical intervention to prevent diseases feom getting worse.


Tuberculosis is a condition caused by bacteria. It has become common in people having HIV. Although the disease is treatable, the body may resist some conventional treatments.

Risk Factors

Tuberculosis can affect people with diabetes, HIV, low body weight, use of certain medicines.

How to Prevent Tuberculosis?

Tuberculosis can be prevented by havibg a vaccine of BCG. Treatment medications are also available depending on your age and condition.


Cirrhosis is a condition that damages the liver. Kidney disease may be the cause for this condition whereas other causes are hepatitis and alcoholism. Scar tissues are formed when the liver is unable to process waste products from the blood. The liver may stop working as a result which then gets worse over time.

Risk Factors

Chronic Alcoholism, fatty liver deposits, and hepatitis are the main risk factors.

How to Prevent Cirrhosis?

Stay away from alcohol use and eay lots of healthy foods to avoid fatty deposits on the liver. Prevent having viral hepatitis by usibg contraceptives. Also, avoid using or sharing anything that has blood on it.

Healthy Approach towards Life

A healthy approach is to follow a healthy lifestyle and diet. Hsalthy changes can bring positivity in your life. Good nutrition along with regular exercise has its role in reducing the risks of various diseases and improving your immune sytem. Moreover, bacterial infections can be prevented by practising proper hand washing.

Khadija Ahmad

An author at Ask Health News, Khadija has good experience in Health And Physical Education and delivers her research work to entertain readers. Her words reflect creativity and intellect as she succeeds in shaping them into interesting articles for readers. Email: khadija@askhealthnews.com

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