>The constitution explicitly carves out allowances for quarantines.
Where? I could be missing something, but I don't see that:
The closest I could find was the part that grants Congress the power to pass any law that it wants, but I don't think that the executive arm could unilaterally lock down interstate travel. It also says:
>The Citizens of each State shall be entitled to all Privileges and Immunities of Citizens in the several States.
We are citizens of the United States, not of one state in particular. We pull together, or we fall apart.