Risk factors

Reading time: 1 min
Baby younger than 6 months old
  • being under 6 months of age.
A lot of people in the same house
  • Crowded conditions, in other words, sharing a poorly ventilated space with many people.
  • Being admitted to hospital.
Baby sleeping with his older brother
  • Having older siblings (especially if they share a bedroom),
Nursery with a baby and the teacher
  • Attending daycare.
Exposure of the baby to tobacco smoke
  • Exposure to tobacco smoke, especially if the mother smokes while pregnant.
  • Breastfeeding for four months or longer has a protective effect.


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