HOW LONG CAN THE FLU VIRUS LAST? LET’S BREAK IT DOWN

It often starts subtly, maybe with a dry throat after a long day or a slight shiver you brush off. But by the next morning, you’re running a fever, your body aches, and even sitting up feels exhausting. Whether it hits you suddenly or slowly sneaks in, the flu makes its presence known.

So what causes recovery to be quick for some and slow for others? Age, immune strength, and the timing of rest or treatment all influence the process. 

Additionally, asthma can start gently, with symptoms appearing only occasionally and still, as it worsens, those episodes grow more frequent, first a few times a week, then daily, and eventually, it feels like the wheezing and breathlessness never truly rest, even at night. [1]

In the following sections, we will examine the duration of the flu virus, the contagious period, and methods for recovery from the flu.

Understanding the flu

The flu is a common viral infection that mainly impacts the respiratory system, including the nose, throat, and lungs. It spreads easily from person to person through coughs, sneezes, or by touching contaminated surfaces and then touching your eyes, nose, or mouth.

While many people recover within a few days, the flu can be more serious for children, older adults, and those with pre-existing health conditions. That’s why prevention and early treatment are so important during flu season. [2]

How long does influenza last?

The flu usually starts 1 to 4 days after exposure to the influenza virus, often with a sudden onset of fever, chills, body aches, and headaches. Many people also experience a sore throat, dry cough, nasal congestion, or a general feeling of being run-down. [3]

These symptoms, such as fever, cough, and headache, can appear suddenly, making it feel like you were fine one moment and unwell the next. These early symptoms can develop rapidly and feel intense, making it difficult to perform daily activities. [4]

Most people start to feel better within 7 to 10 days as their fever and muscle pain subside. However, a dry cough, sore throat, and fatigue may last for another week or more. The severity of the flu varies, and symptoms can range from mild to severe. [5]

While many recover within one to two weeks, complications can occur if the flu isn't properly treated. High-risk groups like young children, seniors, or people with asthma or diabetes may face serious problems like pneumonia, sepsis, or worsened asthma and should see a healthcare professional.

Treatment

If you catch the flu, it is important to rest and stay well-hydrated. Use an effective over-the-counter medication such as Mucinex^® Multi-Action^™ Congestion, Cold & Flu^*, which will help relieve your cold and flu symptoms in one simple solution^**.

It provides relief from chest and nasal congestion and makes coughs more productive.

^*This product may not be right for everyone. Always read and follow the label.

^**Temporarily relieves these common cold and flu symptoms: nasal congestion, sinus congestion and pressure, minor aches and pains, sore throat pain and headache, and reduces fever.

FAQS

How long after exposure do flu symptoms appear?

Flu symptoms typically appear 1 to 4 days after contracting the influenza virus. On average, symptoms appear about 2 days after infection. Most people feel unwell during this time, although for some, symptoms may appear a little earlier or later.

When is it safe to return to work or school after the flu?

It is generally recommended to stay home from work or school for at least 24 hours after your fever has gone and when your other symptoms are improving. Even after these 24 hours, it's still advisable to take precautions to avoid spreading the illness to others for a few more days. 

Can flu symptoms last more than two weeks?

Yes, flu symptoms can occasionally persist for more than two weeks, even though most people typically feel better within one to two weeks.