The Card Key Level 2 is a key item in Resident Evil Outbreak.
This keycard is used to unlock the door to the Underpass entrance.
The keycard is found in the Fixed temperature laboratory of Raccoon General Hospital. This keycard can only be obtained by luring the leech zombie into the fixed temperature laboratory with a blood pack and turning the temperature to 'high' effectively killing the leech zombie. The card will be on the leech zombies body and can only be taken if the temperature is turned back to 'low' after killing the leech zombie.