There isn't a solution to this problem. At least not one that does not make at least one other demographic shit blood clots and half their internal organs.
Close US borders? Economic suicide.
Quarantine all infected? Economic suicide + Healthcare overload.
Ignore the problem? Economic suicide + Healthcare overload + Public Relations Nightmare.
Unless you have a way to magically cure COVID-19 infections, or are hatching a vaccine under your bum, it's too late for quarantine. I am not trying to sound like a doomsayer or anything-- but yeah. This thing is gonna run its course, and that's that. Our society is globally too interconnected, and relies, intrinsically, on EVERYONE continuing to go to work, being freely able to move around, etc. The US's healthcare system is barely functional (really.), and not equipped to handle an emergency like this, because of all the money grubbers wanting pounds of flesh for inexpensively treatable illnesses, and artificially restricting the number of medical practitioners to sustain high wages.
It's harsh as fuck to say, but I say it's about fucking time something like this came to breakfast-- Maybe it will *FINALLY* get people motivated to demand actual systemic changes in how our country is run, so that we can actually deal with emergencies like these, instead of just killing assloads of people because our leaders are in bed with greedy bastards.
Oh, who am I kidding. Wont happen even then. We could have a literal zombie outbreak, and people would be OK with it as long as there was still superbowl and beer.