Introduction

Avian flu, commonly known as bird flu, is a contagious form of influenza that mostly affects birds. Humans may be affected in rare instances. The immune system is essential because it protects your body against pathogens, harmful chemicals, and potentially detrimental cell alterations. It is composed of different cells, proteins, and organs. You are unaware of your immune system's existence as long as it functions normally. However, you become unwell if it stops functioning correctly, either because it is weak or unable to fight against extremely aggressive pathogens. Additionally, unfamiliar germs have the potential to make you sick. Certain microorganisms only cause illness when they come into contact with you.¹

Overview and transmission

The avian flu virus comes in a variety of types. Most of them do not infect people. However, in the past few years, four strains have raised concerns:

• H5N1 (in use since 1997)
• H7N9 (as of 2013)
• H5N6 (as of 2014)
• H5N8 (as of 2016)

H5N1, H7N9, and H5N6 are not easily transmissible and seldom transmit from person to person, although they have infected several individuals worldwide and caused a number of deaths.

The bird flu can spread when in proximity to a contaminated bird, whether dead or alive. This includes:

• Contact with infected birds
• Handling bedding or droppings, executing, or preparing contaminated poultry for cooking
• Another place where bird flu might spread is markets that sell live birds

Risk factors for contracting bird flu, especially in vulnerable populations.²

Impact on people with weakened immune systems

People with weakened immune systems are less likely to be able to fight against infections such as those with HIV/AIDS, cancer, or immunosuppressive medication, are more vulnerable to bird flu. In these cases, the immune system finds it difficult to put up a strong resistance, which raises the possibility of contracting the virus. When infected, these individuals may suffer from pneumonia, multi-organ failure, or septic shock—symptoms that are more severe than those experienced by healthy individuals. The body's inability to react to the infection effectively frequently results in these severe symptoms. Furthermore, immunocompromised individuals require a much longer recovery period since it takes longer for their damaged immune systems to get rid of the virus, increasing the risk of consequences.³

Complications for immunocompromised individuals

Immunocompromised individuals are more vulnerable to follow-up illnesses, including bacterial pneumonia, which can occur after contracting bird flu. The infections have the potential to negatively impact the health and make therapy more difficult. These individuals will need hospitalisation and intensive care because of the intensity of their symptoms and the higher risks of complications, and also have a higher chance of dying. Long-term immunocompromised persons may experience long-term health effects from avian flu, such as lung scarring or persistent inflammation.³

Preventive measures

Among the strategies to lower your risk of avian flu are:

• When dealing with poultry, wild creatures, and domesticated animals, wear safety gear such as gloves, a mask, and goggles
• Handle birds, wild animals, and cattle with caution, and wash your hands often after visiting locations where they reside. This includes going to farms, petting zoos, or places with water features where geese and ducks hang around
• Working with animals that have been exposed to avian influenza is not advised. To stop the spread of an outbreak, abide by public health recommendations
• After you have been in regions where birds such as ducks or chickens reside, remove your shoes before you enter your home. This reduces the possibility of bird droppings or anything else that could be contaminated with the virus spreading throughout your home²

Management and treatment

When symptoms start to appear, doctors should provide oseltamivir (Tamiflu) within 48 hours. But because death rates are high, physicians could potentially decide to provide the drug after 48 hours in an effort to improve the patient's prognosis.

For those aged 13 and older, the recommended dosage of Tamiflu is 75 mg. A lower dosage is required for those under this age, as well as those with end-stage renal disease or kidney issues.

In addition to taking Tamiflu, healthcare professionals recommend that individuals:

• Rest
• Hydrate well with plenty of water
• Consume a nutritious, well-balanced diet
• Take additional drugs to assist in controlling the temperature and discomfort

Individuals infected with H5N1 avian flu frequently experience complications, including bacterial pneumonia. Antibiotics must be taken by anyone with bacterial pneumonia, and some patients may also require supplemental oxygen.²

Conclusion

One of the best ways to prevent infections is to be aware of the associated risks and to take all the appropriate measures.

Those who handle poultry or birds on a daily basis should take extra precautions and seek immediate medical attention if they begin to exhibit symptoms if they are in an area where H5N1 avian flu outbreaks have been identified.

The H5N1 avian flu has a high fatality rate and can cause severe symptoms. On the other hand, there is little chance of a pandemic because the virus is difficult to spread among people.

Although there is currently no vaccine, the risk of contracting or spreading the virus can be reduced by washing your hands frequently, maintaining distance from others, and coughing exclusively into your elbow or tissue.