Influenza A is an acute respiratory infection caused by the influenza A virus. It can affect people of all ages but is more likely to cause severe complications in children, the elderly, and those with underlying health conditions due to weaker immunity. Doctor Nguyen Thi Phuong, from the Nutrition Department at Tam Anh Hanoi General Hospital, advises patients to consume the following fruits to optimize immune system function and promote rapid recovery.

Citrus fruits

Citrus fruits like oranges, lemons, grapefruits, and tangerines are rich in vitamin C and folate, which enhance immune function and support white blood cell production. Beyond vitamin C, these fruits also provide B vitamins, potassium, fiber, and carbohydrates, all contributing to overall health. Their natural water content soothes the throat, reducing symptoms such as coughing, sore throat, and respiratory discomfort.

Most adults need about 75-90 mg of vitamin C daily. Patients should eat or drink fresh citrus juices from ripe oranges, tangerines, and sweet grapefruits to supplement their vitamin intake.

Pears

Pears have a high water content, approximately 80%, which helps to thin respiratory secretions. Pears also offer vitamin C and antioxidants like quercetin, protecting respiratory mucous membranes and supporting immune system activity. Their soluble fiber content nourishes beneficial gut microbiota and reduces inflammation.

Individuals with frequent coughs or sore throats should eat fresh, washed, and thinly peeled pears to minimize irritation. Young children or those with sensitive digestive systems can consume steamed pears. Due to their cooling nature, individuals prone to abdominal pain or loose stools should limit pear consumption.

Star fruit

Star fruit is rich in vitamins C, B, and A, potassium, calcium, iron, phosphorus, oxalic acid, and powerful antioxidant compounds such as gallic acid, quercetin, and epicatechin. These components help reduce oxidative stress and support the body's immune function. This fruit also alleviates common flu symptoms like sore throat and runny nose.

Influenza A patients can consume 90-120 g of fresh star fruit, either juiced or eaten ripe, to avoid throat irritation. Individuals with kidney disease or those taking prescription medications should consult a doctor before consumption, as star fruit contains a significant amount of oxalates.

Strawberries are rich in vitamin C and antioxidants, highly beneficial for individuals with influenza A. Photo: Minh Phuong

Kiwi

Kiwi fruit contains twice the amount of vitamin C found in oranges, along with rich amounts of vitamin E, folate, and fiber. These nutrients enhance the activity of immune cells and help reduce coughing and nasal congestion.

Watermelon

Watermelon is over 90% water, which helps prevent dehydration and reduce fatigue caused by the flu. Nutrients such as vitamin C, beta-carotene, and lycopene in watermelon provide antioxidant effects, reduce inflammation, and strengthen immunity. Patients can juice watermelon to replenish electrolytes and soothe a dry throat. Individuals with blood sugar issues should follow the guidance of a doctor or nutritionist.

Strawberries

Strawberries contain antioxidants and provide numerous polyphenols and vitamin C. Increasing the consumption of this fruit during influenza A helps reduce respiratory inflammation, boost immunity, and contributes to faster health recovery.

Doctor Phuong recommends that influenza A patients eat a diverse range of green vegetables and ripe fruits to ensure a full supply of essential micronutrients, anti-inflammatory compounds, and antioxidants. Prioritize soft, easily digestible fruits, and avoid overly cold foods if experiencing a sore throat.

Hang Tran