This nested case-control study (56 asthma cases, 168 matched controls) from a Finnish birth cohort of 923 children examined whether acute respiratory infections (ARIs) caused by rhinovirus species A, B, or C in the first 24 months of life were associated with physician-diagnosed asthma at age 7 years, distinguishing wheezing illnesses from upper respiratory tract infections (URTIs).
RV-A and RV-C wheezing illnesses in the first 2 years were each independently linked to higher asthma risk at age 7 (RV-A: OR 1.60, 95% CI 1.05–2.43, p=0.03; RV-C: OR 1.66, 95% CI 1.11–2.49, p=0.01). URTIs caused by RV-A, RV-B, or RV-C were not associated with asthma risk. RV-B caused no recorded wheezing illnesses.
- Small number of wheezing episodes per species (especially RV-B: zero wheezing cases), reducing power to detect weaker associations. - Single-country cohort (Finnish children), limiting generalizability. - Potential detection bias: children with more symptoms may have been more likely to have nasal samples collected, though home sampling partially mitigated this.
Early wheezing illness driven by RV-A or RV-C — not just any rhinovirus cold — signals meaningfully elevated asthma risk by school age; clinicians can reassure families that common colds (URTIs) from any RV species do not appear to carry the same risk. Vigilant follow-up for asthma development is warranted in toddlers who wheeze with rhinovirus illness, regardless of whether they need hospital care.
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