To add further discussion re: vaccinations and shingles:
The chickenpox vaccine is controversial. I don't really know what to do about ds because I don't want to give him the vaccination but because the community in the US is 'mostly' vaxed, it means less chance of catching the disease while he is young and it is least harmful.
What is really interesting about chickenpox/shingles is that the evidence shows if you are frequently exposed to chickenpox throughout your life (children, grandchildren etc.) you actually boost your immunity to shingles- so it is actually quite good for most healthy people to be exposed to the disease.
In a natural situation, the vast majority of people would get chickenpox young, be immune to it through their adult lives and be re-exposed frequently through their children so they would avoid shingles later on.
But because we do quarantine our children, many miss getting it as children so catch it as adults (and worse, when they are pregnant) when things are more serious.
Given that there are also people with suppressed immunity around, those consequences can be even more grave.
Understandably then, we have a quarantine culture in the UK - you are expected to quarantine sick children.
But I suspect if no-one quarantined their children, there would be very, very few people who didn't have immunity before adulthood (given that nearly 90% do already have immunity by adulthood with the quarantine culture). You would also strongly cut rates of shingles.
This would be great for the population as a whole, but for that fraction of people who are immuno-suppressed and had never had chickenpox, things would be pretty bad. But if we didn't have a quarantine culture, that percentage of people would be tiny as almost all of them would have had the chickenpox as children.
So... given that there is an expectation of quarantining chickenpoxed children, YABU.
But I wonder if we ABU for quarantining children (and I think the US are definitely BU for trying to push the varicella vaccine on the population and thus messing with natural immunity).
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From nhs.uk:
The vaccine against the varicella virus (which causes chickenpox) is not currently recommended for standard use in children.
In most cases it is a mild illness and around 89% of adults in the UK will develop immunity to the illness.
If the chickenpox vaccine were to be added to the list of childhood vaccinations, it is feared that there would be a greater number of cases of shingles in adults, until the vaccination was given to the entire population. This is because adults who have had chickenpox as a child are less likely to have shingles in later life if they have been exposed occasionally to the chickenpox virus (for example by their children). This is because the exposure acts as a booster vaccine.