"Clear and present danger" is a vague term -- just the kind the Supreme Court is infamous for interpreting whatever way they damn well please.
You could make a good argument that the hundreds of thousands of dead in the US alone of COVID-19 presents a "clear danger", and that the scientific evidence showing that not wearing a mask increases the odds of infection makes it a "present danger".
The danger need not cause deaths in the next minute or second to be "clear and present". Typhoid Mary was imprisoned for the rest of her life for recklessly endangering people with her asymptomatic typhoid infection. People did die because of her actions, but she was imprisoned not because of that but because of the danger she caused to society -- one that did not guarantee anyone would die, but just increase their odds of dying.
People coming from infected areas have also been regularly quarantined, even if there was no proof that any particular individual was infected. This was unarguably a limitation on the quarantined individuals' freedom, but it was deemed permissible to protect public health.
Requiring the wearing of masks is a much milder curtailment of freedom compared to quarantine, so the Supreme Court could certainly uphold such a public health measure were it to be implemented.
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"Clear and present danger" is a vague term -- just the kind the Supreme Court is infamous for interpreting whatever way they damn well please.
You could make a good argument that the hundreds of thousands of dead in the US alone of COVID-19 presents a "clear danger", and that the scientific evidence showing that not wearing a mask increases the odds of infection makes it a "present danger".
The danger need not cause deaths in the next minute or second to be "clear and present". Typhoid Mary was imprisoned for the rest of her life for recklessly endangering people with her asymptomatic typhoid infection. People did die because of her actions, but she was imprisoned not because of that but because of the danger she caused to society -- one that did not guarantee anyone would die, but just increase their odds of dying.
People coming from infected areas have also been regularly quarantined, even if there was no proof that any particular individual was infected. This was unarguably a limitation on the quarantined individuals' freedom, but it was deemed permissible to protect public health.
Requiring the wearing of masks is a much milder curtailment of freedom compared to quarantine, so the Supreme Court could certainly uphold such a public health measure were it to be implemented.