Babies die every year from suffocation. It happens. What they've done is to conflate all sudden infant death (from vaccines) with these suffocations, and then deny that vaccine injuries in infants exist. It's a very clever and sinister bait and switch.
Their proposed solution is to tell all human people not to sleep with their babies, even though humans are the ONLY species of mammal that would dare to sleep away from their own babies in different nests.