Kohlrabi, a popular winter vegetable from the cruciferous family, is often consumed for its nutritional value. However, the notion that it directly prevents the flu is a common misconception.

Traditionally, Eastern medicine views kohlrabi as sweet and cool, attributing to it properties that clear heat, detoxify, thin phlegm, and aid digestion. Modern medical science indicates that kohlrabi contains 91% water and is rich in vitamin C, B6, potassium, magnesium, and folate. While these nutrients can contribute to increased immunity, kohlrabi does not possess antiviral properties to kill flu viruses.

Despite its benefits, kohlrabi should be consumed in moderation. Its high fiber content can cause bloating and indigestion for individuals with stomach issues or young children if eaten raw in large quantities. People with thyroid conditions or weakened constitutions should also limit their intake of this vegetable.

Kohlrabi is a cruciferous vegetable that grows in winter. Photo: Vecteezy

The question regarding kohlrabi's flu prevention capabilities arises as Northern Vietnam enters its winter season, characterized by low temperatures, severe cold, and frost. These conditions often weaken the immune system, making the respiratory system vulnerable to viruses and bacteria. Common pathogens include influenza, pneumococcus, respiratory syncytial virus (RSV), chickenpox, measles, and meningococcus. Infections can lead to symptoms like fever, cough, and runny nose, and potentially severe complications such as pneumonia, meningitis, and sepsis.

Effective prevention against these illnesses relies on vaccination. For instance, the flu vaccine protects against four common strains: A/H3N2, A/H1N1, and two B flu strains. It is administered to children from 6 months old and adults. Children under 9 years old who have not been vaccinated before require two doses one month apart, while those 9 years and older need one dose, followed by an annual booster.

Regarding RSV, Pfizer offers a vaccine for individuals over 60 and pregnant women at 24-36 weeks gestation. GSK provides a vaccine for people over 60 with chronic diseases. Additionally, Sanofi has introduced an RSV monoclonal antibody in Vietnam, administered to infants up to 24 months, offering protection for approximately 6 months throughout the epidemic season.

Beyond vaccination, general health practices are crucial for disease prevention. Individuals should keep warm and limit unnecessary outdoor exposure, especially the elderly and young children. Other recommendations include drinking warm water, consuming nutritious food, increasing intake of green vegetables and fruits, and engaging in light indoor exercise.

ThS.BS Nguyen Van Quang

Medical Manager, VNVC Vaccination System

Readers can submit vaccine consultation questions for the doctor to answer here.