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Small-Scale Question Sunday for February 23, 2025

Do you have a dumb question that you're kind of embarrassed to ask in the main thread? Is there something you're just not sure about?

This is your opportunity to ask questions. No question too simple or too silly.

Culture war topics are accepted, and proposals for a better intro post are appreciated.

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I don't trust your calculations

You can't trust what I haven't presented. I could do so, and I strongly expect to be correct, but I already do enough trawling of medical literature when I'm being paid for it.

It's your child, and I have some respect for your right to make decisions on their behalf, even if I think they're bad decisions.

Furthermore, my children can simply get the shots later in life, when they are grown and have a much larger body mass with which to accommodate, after development has been mostly completed.

My man, you're going from wrong to confused. There's good reason why you don't see doctors or nurses pull out dose calculators to account for body weight when giving every vaccine I can think of it. It's because it doesn't matter. If little Tommy is 4'6 and 35 kilos or 4'9 and 45 makes next to no difference, and this holds true once you're past the size of a premature infant on death's door, going to a land whale who needs a mobility scooter. Vaccines aren't like paracetamol, the dose-response curves are VERY different when it's the immune system we're talking about. Someone with a peanut allergy isn't twice as likely to die if you give them two peanuts versus one.

The eczema finally went away, and there's no way to know the counterfactual, but I think if we were on schedule I'd still be seeing rashes all over the back and legs and ankles

You're not doing a good job at probabilistic reasoning, but an eczematous rash is a minor vaccine reaction, and of very little consequence. If it was life threatening, I presume you'd have pointed that out, and even then, you'd be better off consulting your pediatrician about whether they could narrow it down to a particular constituent of the two common rotavirus vaccines in the States (fetal bovine serum or porcine circovirus, if I had to guess from looking at composition), and take precautions when administering future vaccines with similar compositions. Believe it or not, most doctors would be happy to answer those questions and offer reassurance if warranted, especially if you're paying them.