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Understanding Viral Load Assays for Cytomegalovirus and Epstein-Barr Virus



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Slide 25

March 2010

Another criticism is that it is hard to calculate log in your head, or to compare numbers. But, let's look at the numbers below. Since we know that the number of zeroes after 1 can help us to estimate log numbers, we can use that to stake out a roadmap. Then, if we remember just one other relationship, we can begin to navigate the world of log numbers.

At each midpoint between these numbers, 5000, 50,000, and 500,000, we can see that the log value has a decimal of 0.7. Using these concepts, we can already estimate that 8000 has a log value of more than 3.7, but less than 4. A value of 400,000 has a log value of more than 5, but less than 5.7.

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