We likely have to fight coronavirus through the United Nations because we won't win a fight against coronavirus country by country: why?

Because if you try to fight this country by country it is the same problem as trying to fight coronavirus state by state here in the U.S.

As you can see Red States now are infecting blue states that are more disciplined regarding masks nationally. The same problem exists internationally where some countries are going to infect other countries possibly for 5 to 10 years the way this thing is presently going. 

We didn't have worldwide travel in 1918 like we do now. So, unless you ground permanently all international travel worldwide you aren't going to stop new variations and mutations of coronavirus from infecting the world in an ongoing basis for I don't know how long but at the very least until 2 to 5 years from now worldwide.

This could be something like AIDS that never really goes away and mutates to something like the common cold only as a coronavirus that just keeps killing the way it is presently mutating.

IF it ever mutates to the common cold stage it will literally be a coronavirus common cold that kills because no vaccine can be created for a common cold because it mutates too fast for that.