Pediatric immunology

Why does a child get sick so often?

Frequent illnesses do not necessarily indicate a problem with the immune system. In most cases, they are a natural part of its development, as a child's body is constantly exposed to new viruses and bacteria, gradually learning to recognize them and respond effectively.

Children often begin getting sick more frequently after starting daycare or school. This is due to close contact with many other children, each carrying different viruses. For preschool-aged children, experiencing 6–12 episodes of acute respiratory viral infections (ARVIs) per year can be considered normal, provided they feel well between illnesses, grow appropriately, gain weight, and meet their developmental milestones.

At the same time, a child's overall health is influenced by many factors, including sleep quality, a balanced diet, regular physical activity, stress levels, deficiencies of certain vitamins or minerals, and chronic medical conditions. For example, enlarged adenoids, allergic rhinitis, bronchial asthma, or gastroesophageal reflux disease (GERD) may contribute to recurrent coughing, runny nose, or inflammation, creating the impression that the child is "constantly sick."

There are situations, however, when recurrent illnesses may be caused by an underlying immune system disorder. Warning signs include severe or unusual infections, recurrent pneumonia, multiple ear or sinus infections, the need for prolonged or repeated courses of antibiotics, frequent fungal infections, or a family history of primary immunodeficiency. In such cases, it is important to avoid self-medication and not give children "immune-boosting" products without medical advice.

If you notice that your child gets sick more often than their peers or experiences more severe illnesses, it is advisable to schedule a Pediatric Immunologist Consultation.

How can you tell if the problem may be related to the immune system?

Immune system disorders are much less common than seasonal viral infections. However, certain warning signs may indicate that your child needs a more thorough evaluation by a pediatric immunologist. You should pay attention if your child:

• has pneumonia more than once;
• experiences recurrent ear infections, sinus infections, or bronchitis;
• becomes ill again soon after completing treatment;
• frequently requires antibiotics or needs longer courses of treatment than usual;
• develops severe or unusual infections;
• has frequent fungal infections of the mouth or skin;
• takes a long time to recover from common infections;
• has poor weight gain or delayed physical growth;
• has a family history of primary immunodeficiency.

It is important to remember that even several of these signs do not mean your child has an immune deficiency. Similar symptoms may also be associated with allergies, chronic ear, nose and throat conditions, persistent infections, or other medical issues that require proper evaluation.

For this reason, a diagnosis should never be based on symptoms alone. If you are concerned about your child's immune system, we recommend scheduling a Pediatric Immunologist Consultation. The specialist will review your child's medical history, assess the pattern of recurrent illnesses, determine whether additional testing is necessary, and recommend the most appropriate next steps.

Can you "boost" your child's immune system?

You can find countless tips online claiming to "boost" a child's immune system. However, most of these recommendations are not supported by scientific evidence or apply only to specific medical conditions.

What does NOT help strengthen a healthy child's immune system?

• taking immunostimulants without medical supervision;
• "preventive" courses of antiviral medications;
• dietary supplements without a medical indication;
• vitamins marketed "for immunity" when no deficiency has been confirmed by laboratory testing;
• antibiotics used to prevent viral infections.

What actually supports a healthy immune system?

• age-appropriate vaccination;
• a balanced and varied diet;
• regular physical activity;
• healthy sleep;
• proper management of chronic medical conditions;
• avoiding exposure to secondhand smoke;
• using medications only as prescribed by a doctor.

If your child gets sick frequently, the priority is to identify the underlying cause of the recurrent illnesses. Effective treatment always begins with an accurate diagnosis.