A new disease has been discovered in the world, it is called Blue. Statistically 1:1000 people in the world has it and it makes your whole skin blue in a few weeks after getting the disease but not kill you somehow but you became like an blue alien. Moreover it is not known how it spreads.
Though if you can take antidote before becoming blue and while disease in your blood, you are most likely be saved from being bluefor the rest of your life. But if you take the antidote before getting disease, you will not be saved any more for sure since the disease becomes immune to the antidote after entering the body while antidote exists in your system.
There is a very very expensive lab test for that and the accuracy of that is 99%. In other words, 1% it will show you wrong result. You take the test and it seems you are positive.
If I take the antidote now,
What is the chance of becoming immune to the disease?