The big downside of being exposed to germs—or specifically, to sick kids—during these early weeks is the possibility of setting off this chain of interventions. If your infant does get sick, these procedures make sense, but if they just caught a cold from being pawed by a germy two-year-old, you’ll be doing a lot of interventions for no reason. It’s therefore better to keep the germy two-year-old away from the newborn, if at all possible. Once your baby is over three months, and especially after they’ve had the first set of vaccines, treatment of a fever is closer to what you’d expect with an
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