The best answer for this question would be to talk to the cashier, in situations like these the customer is always right and knows exactly what they want, and if that doesn't work out ask the manager so he can get the correct coffee he wishes for.
How was your mental status last week?
Is there bad energy (at said location) ?
Answer:
Wont they still have the same genes, so they wouldnt be immune to anything? Like if you breed grey with blue they have different genes and can have different immunities to different things