Just what makes you think it won't happen again. No, so far this isn't 1918 and some of that is due to the country shutting down a lot quicker than it did in 1918. Plus, we didn't have thousands of infected vetrans returning from a war on troop ships infected with the virus and then turned loose to spread it all over the county.
Not trying to start an argument here, but....
Your post, as I understand what happened in 1918 is completely wrong.
The Spanish flu seems to have originated with a recruit that was stationed in Kansas, I think.
I dont remember his name, but he was a cook and spread it to everyone. Plus side, he survived.
From there the military took over.
President Wilson didnt see a choice of not sending troops.
And there weren't many precautions taken then either.
The point being, our troops didnt bring it back here, it started and was spread by the troops here.
At least, that's my knowledge anyway.