The Georgetown CDC exists to rid and identify aliens infected with the z.Noman virus. There are two types of this virus: type 1 and type 2. It is your job to solve the cases of the 30 originators, or those infected with type 1 (chosen at random every reset).

To first gain access to the CDC, 5% of the alien population must be infected, with either type 1 or type 2. Once the initial 5% is met, you are allowed to choose a case file as long as it is unsolved.

Once you choose a case file, you are allowed to enter ID's of potential "suspects". Every time you enter a guess, you're forced to wait a few minutes before the case file is available for review. When the case file is available, one new stat (level, age, gender, alignment or karma rating) will have been updated. The update will most likely be non-descript, giving you a range (above, below or rarely exact) from a point based off the previously-guessed alien.

Eventually, after guessing aliens with specific traits, you will be able to narrow down a set of aliens that meet the case file details. At this point it's advisable to check their individual details for an infected icon (the red biohazard image). Once you've gathered aliens with that, guess each one and continue to narrow your results down.

You will know when you've guessed correctly, as the result is instant (as opposed to waiting 2 minutes for an update).    

The reward for correctly identifying an originator is a 15% ATK bonus versus all infected aliens.