The In the Lab expansion requires you to move cubes into dishes in order to cure diseases and beat the game.
Once a disease have been cured, the "automatic" ability of the Medic is that all of the cured disease cubes are removed when he enters a city.
In the rule-set it is stated that the ability of the medic cannot move any cubes to the sample dishes.
I interpret this as once a disease is cured, the Medic can no longer move any cubes of that color to the dishes, because when he is done taking his move action, the city already has all the cubes removed, before the treat action could be taken.
Is this the correct interpretation of the rules?