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False Positive

Interactive tool for understanding medical testing probability.

Probabilities

The probabilities are shown by default. These describe what your chances are of having the disease given a certain result.

Simulator Screen Shot - iPhone 11 - 2020
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Actuals

Click the Actuals tab where you can see the distribution of hypothetical test results based on your parameters.

More Details

Click on the info button for an in-depth discussion of what all of these numbers mean and how they are derived using math!

Simulator Screen Shot - iPhone 11 - 2020