Influenza—commonly known as the flu—is a highly contagious viral infection that affects the respiratory system, including the nose, throat, and lungs. Influenza viruses spread through respiratory droplets when an infected person coughs, sneezes, or talks. There are two main seasonal strains that circulate each year:

• Influenza A
• Influenza B

Both types can cause mild to severe illness and may lead to complications in vulnerable individuals, particularly:

• Young children
• Older adults
• Pregnant women
• People with chronic medical conditions

Flu outbreaks tend to occur most frequently during the colder months, which is why influenza is often referred to as seasonal or winter flu.

Common Symptoms of Influenza in Adults

Flu symptoms often appear suddenly and may include:

• Fever or chills
• Headache
• Sore throat
• Runny or congested nose
• Persistent cough
• Fatigue and weakness
• Muscle aches and body pain
• Chest or sinus congestion

Most healthy adults recover within several days to a week, although fatigue may last longer. However, in some cases influenza can lead to complications such as:

• Pneumonia
• Bronchitis
• Sinus infections

Flu Symptoms in Children

Children may experience similar symptoms to adults but can also develop additional digestive symptoms. These may include:

• Nausea
• Vomiting
• Diarrhoea

Natural Ways to Support Recovery From the Flu

Rest, hydration, and supportive care are the most important elements of recovery. Certain natural remedies may help relieve symptoms and support immune function.

Steam Inhalation

Steam inhalation may help relieve nasal congestion. Adding eucalyptus oil to hot water and inhaling the steam for several minutes may temporarily open nasal passages and ease breathing.

Chest Rubs With Essential Oils

Essential oils such as eucalyptus or peppermint diluted in a carrier oil (such as olive or almond oil) may be gently applied to the chest to help create a warming sensation and promote easier breathing.

Herbal Immune Support

Several herbs have traditionally been used to support immune function during respiratory infections. Examples include:

• Echinacea
• Garlic
• Ginger
• Licorice root
• Olive leaf
• Andrographis

These herbs are traditionally used to support immune responses and may help reduce the duration or severity of cold and flu symptoms in some individuals.

Probiotics

Probiotics provide beneficial bacteria that support gut health. Because much of the immune system is located in the digestive tract, maintaining a healthy gut microbiome may help support immune resilience.

Vitamin C Gargle for Sore Throat

A simple gargle made from vitamin C powder dissolved in warm water may help soothe irritated throat tissues and provide antioxidant support. Some people also add herbal extracts such as echinacea or olive leaf.

Diet Tips to Support Recovery From the Flu

Nutrition plays an important role in supporting the immune system during illness.

Stay Well Hydrated

Hydration helps regulate body temperature, loosen mucus, and support the removal of metabolic waste. Aim to drink at least two litres of fluids per day, including:

• Water
• Herbal teas
• Broths
• Vegetable juices

Herbal Teas for Immune Support

Warm herbal teas can be soothing during illness. Examples include:

• Ginger and lemon tea
• Rosehip tea
• Licorice root tea
• Echinacea tea

Eat Vitamin C–Rich Foods

Vitamin C supports immune cell function and antioxidant protection. Foods rich in vitamin C include:

• Citrus fruits such as oranges, lemons, and grapefruits
• Kiwi fruit
• Strawberries
• Capsicum
• Broccoli
• Kale and other leafy greens
• One particularly rich source is the Australian native fruit Kakadu plum, which contains extremely high levels of vitamin C.

Choose Light, Nourishing Meals

When the body is fighting infection, simple meals may be easier to digest. Examples include:

• Chicken soup
• Vegetable soups
• Miso soup
• Steamed vegetables
• Vegetable broths

Use Manuka Honey

Manuka honey is traditionally used for its soothing and antimicrobial properties. Adding it to warm lemon drinks may help calm sore throats and support immune health.

Include Natural Decongestant Foods

Certain foods contain compounds that may help loosen mucus and support respiratory comfort. Examples include:

• Garlic
• Ginger
• Chilli
• Horseradish

Ensure Adequate Vitamin D

Vitamin D plays an important role in immune regulation.

Dietary sources include:

• Salmon
• Egg yolks
• Mushrooms
• Cod liver oil
• Sunlight exposure also supports vitamin D production.

Include Vitamin A–Rich Foods

Vitamin A supports the health of mucous membranes in the respiratory tract.

Foods rich in vitamin A include:

• Liver
• Spinach
• Sweet potato
• Carrots
• Pumpkin
• Mango
• Papaya

Supporting Immune Health During Flu Season

Maintaining strong immune function year-round can help reduce the risk of infections. Healthy immune habits include:

• Eating a nutrient-rich diet
• Managing stress
• Getting adequate sleep
• Regular physical activity
• Maintaining gut health

✔️ While most people recover from influenza within a week, proper rest, hydration, and supportive nutrition can significantly improve recovery and comfort during illness.