A tyranny by any other name

[ConstantineX]

Natedogg & Others,

Do you guys reject wholesale the concept of public goods and externalities? I think that's silly. Our government has done a pretty good job with public health, and immunizations are a major concern of private charities working in poor countries. What tyranny should pop out at me here?

EDIT: Just to be sure, the issue here isn't school choice. Does the government have the right to mandate immunization?