Influenza kills children — even previously healthy ones. Dr. Sushma B explains why influenza is genuinely dangerous, why it is different from the common cold, and why annual vaccination is the most effective protection.
Key Points
- Influenza virus causes a distinct illness — high fever 38.5°C+ for 3–5 days, severe body aches, headache, and notable exhaustion — not the 'common cold.'
- Influenza causes 3–5 million cases of severe illness and 290,000–650,000 deaths globally each year — children under 5 are at highest risk.
- Annual flu vaccination is recommended by the Indian Academy of Pediatrics for all children aged 6 months and above.
- The flu vaccine must be given annually because influenza viruses undergo antigenic drift — each year's vaccine is reformulated to match current circulating strains.
- Post-influenza complications include: bacterial pneumonia, viral myocarditis, acute otitis media, and rarely encephalitis — all preventable with vaccination.
650,000
annual deaths globally attributable to influenza — making it one of the most lethal vaccine-preventable diseases
Source: WHO Influenza Fact Sheet
40–60%
vaccine effectiveness of annual flu vaccine against confirmed influenza illness in children
Source: Cochrane Review on Influenza Vaccines
6 months
minimum age from which annual influenza vaccination is recommended in India
Source: Indian Academy of Pediatrics Immunisation Schedule
"As a paediatrician I vaccinate children against flu every year and I advise every parent to do the same. Influenza is not 'just a cold' — a child with influenza is floored for a week, at risk for serious bacterial complications, and highly infectious to grandparents and immunocompromised family members. The vaccine is safe, effective, and updated annually."
Influenza vs Common Cold — The Difference Matters
The "cold" that causes a runny nose and mild sore throat for 3–5 days is almost always caused by rhinoviruses or coronaviruses — not influenza. Influenza is caused specifically by Influenza A or B viruses and produces a distinctly more severe illness:
- Sudden onset — from feeling well to very unwell within hours
- High fever (39–40°C) — often the first and most prominent symptom
- Severe body aches and headache — "I've been hit by a truck"
- Significant fatigue — prostrating, unable to get out of bed
- Cough — often painful and persistent
- In children: febrile seizures, croup, bronchiolitis, secondary bacterial pneumonia, myocarditis, encephalitis
Who Is at Risk of Severe Influenza?
Children under 5 (especially under 2) are at highest risk of serious influenza complications. Children with asthma, heart disease, diabetes, immunosuppression, and neurological conditions are at very high risk. But importantly — severe influenza also occurs in previously healthy children. Every influenza season sees deaths in healthy children with no prior medical conditions.
Why Annual Vaccination?
Influenza viruses mutate rapidly (antigenic drift) — the strains circulating this year are different from last year's. The vaccine is updated annually to match the predicted circulating strains. A flu vaccine from 2 years ago provides little protection against this year's virus. Annual vaccination before the monsoon season (when influenza peaks in South India) is the recommendation.
Does the Vaccine Work?
In a well-matched year, the flu vaccine reduces influenza illness by 40–60% in children. More importantly, it dramatically reduces the risk of severe disease, hospitalisation, and death — even when it does not prevent infection entirely. A vaccinated child who gets influenza typically has a milder illness of shorter duration.
For flu vaccination and paediatric care: Dr. Sushma B at Sri Anand CNC, Chanda Nagar, Hyderabad. Call +91 90633 66983.
Dr. Sushma B
DNB Paediatrics · Fellowship PICU · Sri Anand CNC, Chanda Nagar Hyderabad · Sri Anand Child and Neuro Center
MD Paediatrician with 10+ years of clinical experience in child health, vaccination, developmental paediatrics, and newborn care. Practices at Sri Anand Child and Neuro Center, Chanda Nagar, Hyderabad.
References & Sources
- 1.Child Health — WHO — World Health Organization
- 2.IAP Clinical Guidelines — Indian Academy of Pediatrics
- 3.Children's Health — NIH MedlinePlus — NIH MedlinePlus
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