Last time, it was the United Kingdom and South Korea. This time, it's Poland. And yes, the strain of bird flu involved was the dreaded H5N1 strain, which has been known to infect humans as well as birds.

Find out where those sites were located after the jump!

Biological warfare, while undoubtedly nothing new, is still enough to send us cowering in fear at the mere mention of it. After the much publicized Anthrax attacks in the United States some years back, we are yet again reminded of how devastating this method could be, especially to unsuspecting citizens. It may not have loud explosions like that of bombs or guns going off, but it could be just as deadly and catastrophic.

But did you know that when push comes to shove, you can actually use this type of warfare for your own protection? Yup, that's right. As a matter of fact, this is what two clever Polish doctors did back in World War II to help spare their countrymen from being sent to concentration camps by the Nazis.

Drs. Lazowski and Watulewicz were living in Poland in 1939 when the Nazis invaded and began deporting the population into concentration camps. Upon being summoned for help by a young man condemned to slave labor in Germany, the two doctors tried a unique deception. Injecting Proteus into the young man, the blood sample sent to Germany for testing came back positive for typhus, and he was thus spared.

What was this Proteus that saved the life of this man and hundreds others? It is a microorganism also known as Proteus Ox19, which, in most ways is but an entirely ordinary little bacterium. What makes this otherwise ordinary bacterium remarkable is that human antibodies for it cross-react with the antibodies for Ricksettia, the bacterium responsible for the deadly disease typhus. Blood from a patient infected with Proteus Ox19 will give a false-positive reading in the Weil-Felix test, the most common typhus screening method.

Seeing the huge potential this deception may incur, insofar as saving others were concerned, they set out to carry out their plan in a larger scale, sending reports to the German army that there could very well be an outbreak of typhus among the Polish citizens. With Proteus injected into the Polish bloodstream, the Germans then began to believe that there was indeed an epidemic.

Of course, the Germans sent an on-site Nazi medical team to the "afflicted" areas of Poland, which could have very well seen through their plots. But thanks to the good ol' Polish hospitality - food and vodka - the German medical team was easily dissuaded from closer inspection, as they feared infection, and were convinced enough to leave.

Now, that's smart thinking. Who would have thought that biological warfare, food, and vodka go well together?