The process of producing a virus which causes a reduced amount of disease for use as a live vaccine is called ________________

The process of producing a virus which causes a reduced amount of dise

1.	The process of producing a virus which causes a reduced amount of disease for use as a live vaccine is called ________________
A.	attenuation
B.	avirulent
C.	virulent
D.	adjuvant
Answer» B. avirulent