Not necessarily a fan of forced vaccination, but a little remark to further the discussion:

Unlike most medical interventions, vaccination is not about one's individual well-being, but more about the protection of the entire population, especially other, more vulnerable individuals (https://en.wikipedia.org/wiki/Herd_immunity).

This is why some vaccines are recommended even if you're not especially in danger, because they help protect others that may not be able to be vaccinated (because they are too weak, or due to a special reaction to the vaccine etc.)

Not saying that it means that forced vaccination is morally justified however! But the question of vaccination is definitely not simply about individual choice in regard to one's own health.

For that reason the laws don't make vaccinations mandatory, they make it illegal to enter public schools without a vaccination. Limiting dangerous activities in public places is accepted by most as a valid function of government.

I consider people who vote differently from myself to be a threat to my safety. Acting on that opinion is not a good idea.

The question isn't 'can we rationalise this?' - we can rationalise everything. The question is 'is the threat great enough for the government to start infringing on liberty?'. It probably isn't, otherwise we'd ban all hard and soft drugs (including alcohol & smoking) as a similar level of threat to public health. That battle has been fought and lost by the public safety folks.

An incentive program would probably be a good idea, but I expect there is already one in place.

Actually nuance is given close to the proper level of attention. You may drink yourself to death but some controls are in place to reduce the chance you’ll run someone over via drink driving. You may smoke but not in places where you might be fumigating others involuntarily. Etc.

It’s all about managing th externality.

> That's the stuff of dictatorships.

I think that’s over the top. The most legitimate argument for forming governments is the management of externalities. It infringes on the factory owner’s liberties to restrict their dumping of toxic waste into the river.

Likewise vaccines and quarantine are ways to limit the spread of dangerous pathogens.

Abortion has externalities. However, we've decided that individual medical autonomy over one's body is sacred.

What externalities are you talking about? I fail to see how forcing women to give birth to children would do anything positive for society: either you'd have to force them to raise them, which would result in tons of children being raised by single mothers who don't want them, which doesn't sound like a very good environment (and also violates individual autonomy) and would have a lot of negative economic effects for society, or you'd end up with tons of kids in foster homes or orphanages, which would also have lots of negative economic effects for society, both for the costs of institutionalizing these children, and then later all the social problems they'll cause when they grow up and become criminals.

There are no real negative effects for vaccination, as long as you don't force them on people who have genuine medical conditions preventing them from taking them safely (e.g., allergy to vaccine components).

Externalities on the fetus.

Thought experiment: a government is faced with a problem, where they have to either force people at gunpoint to get a vaccination for a deadly disease, or the society will utterly collapse because too many people stupidly refuse to get this vaccine because of unfounded fears spread by some people who have a financial interest in doing so and don't understand the societal consequences of this (a pandemic is coming and it will wipe out most of the population). Is it right for the government to force vaccinations in this case?

Also, an interesting note: if you join the military, you have to get vaccinations. You're not allowed to opt-out.

Vaccination is not treatment. And we are being "forced" to undergo much more than that which is in our interest: filtering of air and water, food quality regulations and so on.