Really? So does that include emergency workers too?
Scenario - your house catches fire. You drag your family out, emergency services arrive, you and your family are taken in for treatment. You all have covid, asymptomatic. Bam, covid has entered the hospital, and the domino effect begins.
What you're describing is basically the entire country of America shutting down including emergency and essential workers, and nobody being able to buy food and essential supplies for 3 weeks. And don't even say "online shopping" because that's both unrealistic for 300million people and also involves you know, fucking people delivering that food from home to home. Christ.
If that's what you're suggesting, yeah you might be able to get rid of covid. Until the next plane lands in the States from overseas.