Congrats

magheswarikrishna
Graceynapple
hema4inbaa
SeecretGal

ANSWER:

The two words were,
  "Be positive"
The nurse misunderstood as,
   "B - Positive"
and started to give the patient that group of blood which was luckily the patient's blood group.
Was it not risky?

Is that clear?

Am I correct?

Shall we proceed?

Then feel free to vote, comment your views, ideas.....