By Judith MillerWriter/FOX News Contributor World Health Organization That constitutes a true pandemic. As of 7 p.m. on April 28th, seven countries, including the U.S. and Mexico had officially reported cases of the H1N1 swine flu influenza. So should we shut the borders? Alas, the flu cat is definitely out of the proverbial bag, WHO officials say, with suspected cases now being reported in Israel, the U.K., Spain, and far-flung New Zealand.

Judith Miller, a Fox News contributor, is an award-winning writer and author, and an adjunct fellow at the Manhattan Institute. The author of several books, her latest is "The Story: A Reporter's Journey" (Simon & Schuster, April 7, 2015) now available in paperback. Follow her on Twitter @JMFreeSpeech.