which fungal extract was extensively used in treating wounded American soldiers in World war II?

Allied Powers in World War II

Which of the following antibiotics was extensively used to treat American soldiers wounded in World War II ?

Which of the following antibiotics was extensively used to treat American soldiers wounded in World War II ?

Which of the following antibiotics was extensively used to treat American soldiers wounded in World War II ?

Which of the following antibiotics was extensively used to treat American soldiers wounded in World War II ?

Pencillin was extensively used to treat American Soldiers wounded in "____" World War.

How did USA enter into World War - II

when did US enter the World War II ?