More booga booga.
And here is why.
The "Black Death" has a lot of good PR value, but the fact is that it is now easily cured in the very nations this article suggests are possible targets. Because of the great plaques modern society does not tolerate dense populations of rats, which means the primary vector to spread a rapid contagion no longer exists. Hence, while "Black Death" makes for great headlines, its practicality as an actual terror weapon is limited.