Or maybe it’s less dangerous for older children because they were already exposed as younger children.
Immunology is really tricky because the human immune system is quite complex. These kinds of findings sadly need to be taken with a grain of salt.
Immunology is really tricky because the human immune system is quite complex. These kinds of findings sadly need to be taken with a grain of salt.
For example, if your toddler has a stuffy nose, you can help them to blow it. For an infant, you need a tool to suction their nose which can be difficult to do. That same stuffy nose might cause poor feeding and dehydration which on top of the general breathing issues caused by RSV can lead to a rapid deterioration in the infant's health.
Even with all the supportive care (oxygen, regular suctioning, a feeding tube), it took a full 5 days in the hospital for our infant to recover.
My first-hand experience with this seems to be consistent with larger trends as well. A recent CDC presentation shows that children age 0-5 months are hospitalized by RSV at far higher rates than any other age group. [1]
[1]: https://www.cdc.gov/vaccines/acip/meetings/downloads/slides-...
Evidence with a sample size of 1: I have a pandemic toddler and a baby. Toddler was not sick once in first 18 months. Both just got RSV. Toddler was fine after a couple days. Infant was in ER and is still having effects weeks later.
None of that is to downplay the potentially fatal seriousness of RSV. The immune system is imperfect after all. The NICU is maybe the most depressing place I’ve ever been in my life and my heart goes out for every parent who has or has had a child there or in any pediatric ICU.