How about this: A tree can make a million matches and one match can burn a million trees.
One little “match” can spread a lot of destruction.
Put out the single match before it spreads.
That's why they should shut the f'ing border. Every single person that comes across infected is another disease vector. Not a big deal with colds or standard flu, a big deal with this - because if it takes hold in the population there's no stopping it, and if it then mutates like the 1918 flu...look for millions of dead.
That's alarmist, but better to be safe than sorry. Shutting the border and a few other elementary measures won't cost much, being complacent about something with the potential that this has is very, very stupid.