When all the values in a data set are written in order from least to greatest, the value that is in the middle, with an equal number of values below it and equal number of values above it, is called the .

Answergoing for a brief walk ahead of time and stretching afterward;

Hepatitus b, hepatitus c, hiv, and tetanus

The american and russian labs that have the last of the live virus are run by fallible, corruptible  human  beings, who are given orders by governments staffed by fallible, corruptible  humanbeings. bio-war using  smallpox  isn't out of the question for either country's military establishment.