How long does the flu last? Tips for a faster recovery

Influenza, or the flu, is a respiratory illness that usually lasts around a week. However, symptoms such as cough and fatigue can persist for about 2 weeks.

Here’s how to recover more quickly from the flu:

“The typical duration of flu is 5 to 7 days,” says Professor at NICM Health Research Institute and School of Science, Kamal Dua. “In severe cases, or for people who have pre-existing conditions, it may last longer. Fatigue and a cough can hang around for around 2 weeks.”

“There are a number of factors that can influence recovery from the flu,” says Dr Jason Girkin from the School of Biomedical Sciences and Pharmacy at the University of Newcastle.

“Some are out of our control, such as age and genetics. People who are younger tend to recover faster, and some people are naturally more susceptible to flu infection.”

However, there are some factors we can control:

Get vaccinated

To reduce your chances of getting the flu and having severe symptoms, it’s recommended that everyone over the age of 6 months have a seasonal flu vaccine.¹ “The flu vaccine reduces the likelihood of severe symptoms or hospitalisation,” says Jason. The flu vaccine is free for people at high risk.

Act fast

“If you do have the flu, we know that the earlier the intervention, the better,” says Jason. “Usually, by the time someone seeks treatment, they’ve had symptoms for a day or 2 already. The sooner you act, the better. That can mean resting, staying at home, eating well and staying hydrated.”

Use a nasal spray

“A simple saline nasal spray can shorten the duration of respiratory infections,²” says Jason. “Take it as soon as you notice any symptoms.”

Take anti-viral medication if you’re eligible

“Anti-viral medication can help reduce the severity and duration of the virus, as well as any complications,” says Kamal. “Most anti-viral medication is only effective if taken within 48 hours of the onset of any symptoms.” High-risk groups who catch the flu are advised to take anti-viral medication. This includes the older Australians, anyone who is pregnant, those who are immunocompromised, have diabetes, or have chronic diseases such as lung or heart disease.³ Talk to your doctor about what might be suitable for you.

Sleep

“Getting enough sleep is a critical factor in speeding up recovery,” says Kamal. Shortened sleep reduces the body’s ability to fight infections. Getting less than 7 to 9 hours of sleep a night is linked to an increased risk of catching upper respiratory infections.⁴

Don’t overdo it

“If you’re feeling awful, don’t push yourself to start exercising,” says Jason. “Listen to your body.”

Stay hydrated

“When you're dehydrated, your body has to spend its energy dealing with that process, rather than helping your immune system function,” says Jason. “Staying hydrated increases your body’s capacity to fight the virus.” Water is ideal, but herbal teas can also help you stay hydrated. Avoid alcohol and caffeine as they can be dehydrating.

Use over-the-counter medications

“Although over-the-counter decongestants and pain relievers, such as ibuprofen or paracetamol, won’t reduce the duration of the flu, they can help you manage symptoms,” says Jason.

Take Vitamin C and Zinc

“There’s some evidence to show increasing levels of zinc⁵ and Vitamin C6 may reduce the duration of respiratory illnesses,” says Kamal. It’s important to chat to your doctor before commencing any supplementation.

Healthdirect provides free health advice and information, including a cold or flu symptom checker. Visit their website or call them on 1800 022 222

The Australian Government Department of Health and Aged Care provides advice on influenza vaccination and who is eligible for free vaccines.