Influenza virus

 

Introduction

Influenza is a viral infection that attacks your respiratory system — your nose, throat and lungs. Influenza is commonly called the flu, but it's not the same as stomach "flu" viruses that cause diarrhea and vomiting.

 

For most people, the flu resolves on its own. But sometimes, influenza and its complications can be deadly. People at higher risk of developing flu complications include:

Influenza is a virus that affects your respiratory system, which includes your nose, throat, and lungs. Although influenza is usually referred to as the flu, it differs from stomach "flu" viruses that cause diarrhoea and vomiting.

 

For the most part, the flu goes away on its own. However, influenza and its consequences might be fatal in some cases. The following people are at a higher risk of having flu complications:

 

•Young children under the age of five, particularly those under the age of six months

•Adults over 65 years old

Nursing home and other long-term care facility residents

•Women who are pregnant or within two weeks of giving birth

•Immune-compromised individuals

American Indians

•People with chronic illnesses like asthma, heart disease, kidney disease, liver disease, and diabetes. People who are extremely obese, with a BMI of 40 or higher.

•The annual influenza vaccine is still your best defence against the flu, even if it isn't 100 percent effective.

 

Symptoms:

At first, the flu may seem like a common cold with a runny nose, sneezing and sore throat. But colds usually develop slowly, whereas the flu tends to come on suddenly. And although a cold can be a bother, you usually feel much worse with the flu.

 

Common signs and symptoms of the flu include:

 

Fever

Aching muscles

Chills and sweats

Headache

Dry, persistent cough

Shortness of breath

Tiredness and weakness

Runny or stuffy nose

Sore throat

Eye pain

Vomiting and diarrhea, but this is more common in children than adults

Symptoms

The flu may appear to be a normal cold at first, with a runny nose, sneezing, and a sore throat. Colds, on the other hand, normally take time to develop, whereas the flu strikes rapidly. And, while a cold might be annoying, the flu usually makes you feel much worse.

 

The following are common flu signs and symptoms:

 

•Fever

•Muscle aches

•Sweats and chills

•Headache

•Cough that is dry and persistent

•Breathing problems

•Weakness and exhaustion

•a stuffy or runny nose

•throat irritation

•Eye discomfort

•Vomiting and diarrhoea are prevalent in youngsters but not in adults.

 

When to see a doctor:

Most people who get the flu can treat themselves at home and often don't need to see a doctor.

 

If you have flu symptoms and are at risk of complications, see your doctor right away. Taking antiviral drugs may reduce the length of your illness and help prevent more-serious problems.

 

If you have emergency signs and symptoms of the flu, get medical care right away. For adults, emergency signs and symptoms can include:

 

•Difficulty breathing or shortness of breath

•Chest pain

•Ongoing dizziness

Seizures

•Worsening of existing medical conditions

•Severe weakness or muscle pain.

 

Causes:

Modes:

 

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Influenza viruses travel through the air in droplets when someone with the infection coughs, sneezes or talks. You can inhale the droplets directly, or you can pick up the germs from an object — such as a telephone or computer keyboard — and then transfer them to your eyes, nose or mouth.

 

People with the virus are likely contagious from about a day before symptoms appear until about five days after they start. Children and people with weakened immune systems may be contagious for a slightly longer time.

 

Influenza viruses are constantly changing, with new strains appearing regularly. If you've had influenza in the past, your body has already made antibodies to fight that specific strain of the virus. If future influenza viruses are similar to those you've encountered before, either by having the disease or by getting vaccinated, those antibodies may prevent infection or lessen its severity. But antibody levels may decline over time.

 

Also, antibodies against influenza viruses you've encountered in the past may not protect you from new influenza strains that can be very different viruses from what you had before.

When someone with influenza coughs, sneezes, or talks, the virus spreads through the air in droplets. You can directly inhale the droplets, or you can pick up germs from an object (such as a phone or computer keyboard) and then transmit them to your eyes, nose, or mouth.

 

People infected with the virus are likely contagious from the day before symptoms begin to five days after they appear. Children and others with compromised immune systems may be contagious for a longer period of time.

 

Influenza viruses evolve rapidly, with new strains emerging on a regular basis. If you've ever had influenza, your body has already produced antibodies to combat that particular strain. If future influenza viruses are identical to those currently circulating,

 

Prevention:

The best way to prevent influenza is to get a flu vaccine every year. The influenza virus is constantly changing. Each year, scientists work together to identify the virus strains that they believe will cause the most illness, and a new vaccine is made based on their recommendations.

 

•It is recommended that everyone over the age of 6 months receive the yearly influenza vaccine.

•Children between 6 months and 8 years of age may need two doses of flu vaccine to be fully protected from flu. Discuss this with your child's healthcare provider.

•Children younger than 6 months of age are at higher risk of serious flu complications but are too young to get a flu vaccine. Because of this, safeguarding them from flu is especially important. If you live with or care for an infant younger than 6 months of age, you and others in your family should get vaccinated to help protect them from the flu.

A high potency flu vaccine is available for those over 65. Discuss this with your healthcare provider.

•The best time to get the flu vaccine is soon after it becomes available in the fall of each year.

 

Conclusion:

 

Influenza vaccination is the most effective strategy to prevent influenza infections, reduce the severity of illness, and save lives during seasonal outbreaks and pandemics. While influenza is one of the greatest public health and national security challenges, other emerging infectious diseases can also have a devastating impact on human health and the economy. The capacity and capabilities developed for seasonal and pandemic influenza preparedness will enable the USG to respond more effectively to other emerging infectious diseases. Collaborative efforts across the federal government, academia, the private sector, and international stakeholders over the past decade have advanced influenza vaccine technologies. However, significant gaps remain in vaccine effectiveness, pace of vaccine production, sustainable manufacturing, and vaccine access and coverage across all populations. Therefore, the NIVMS positions the USG and its partners to respond more quickly and effectively to future influenza pandemics and, simultaneously, strengthen our response to seasonal influenza. Advancing the United States’ vaccine enterprise is a formidable task and must be coordinated across federal and SLTT governments, private partners, non-governmental organizations, academia, professional associations, and international stakeholders.