To quote justice Robert H Jackson 'The constitution is not a suicide pact.' In sufficiently bad circumstances (wars, emergencies) governments will tend to enforce first and worry about legalities later.
And in cases like this, where the emergency is biological rather than political in nature, pedantic legalism is going to lose to common sense and pragmatism.
And in cases like this, where the emergency is biological rather than political in nature, pedantic legalism is going to lose to common sense and pragmatism.