Faulty gene can turn colds deadly for babies, toddlers
Rare variants hurt ability to detect, fight viruses
![sick child](https://i0.wp.com/www.sciencenews.org/wp-content/uploads/2016/05/051316_ti_pneumonia_free.jpg?fit=860%2C460&ssl=1)
UNEASY BREATHING Some children have rare genetic variants that can turn their first encounter with colds and other respiratory viruses deadly.
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