“What about our civil liberties?”
These are extraordinary times, and citizens are being asked to comply with extraordinary measures judged beneficial to the common weal.
It is up to us to ensure that things return to the status quo ante—or better—when the epidemic passes.
So long as the Second Amendment remains intact, that should be possible.
Quarantines are part of English law we inherited with our constitution and there is no constitutional right against being confined so long as you are infected with a dangerous contagious disease.