If you're alive today, you're immune to it. What-ever the plague was is still with us...we survived.
It's the new stuff that is mutating in Asia that you should worry about...Bird Flu's and such.
One of the most feared scenarios in the study of diseases is stumbling across an ancient plague victim who was the last of the 100% to die of that disease. This thinking is even part of the model for why things like Ebola haven't spread worldwide. Besides being too fragile they are, more importantly, too efficient at killing their hosts. Put bluntly the poor buggers who get Ebola and related diseases die before they can get far enough to spread the disease.
Well, there are plagues far more deadly than Ebola, but like that disease they killed their victims before they coukd spread it far. What if we dig up victims of such a plague and decide we should examine them at Columbia Pres or in Paris?
Folks who study this even use the phrase The 10th Plague as shorthand for this happening.
Maybe the Spanish Flu - which spread pretty much world wide, but certainly not a relatively local plague in ancient Egypt.
pardon my stupid for poking at a two year old post. :)