Posted: July 16th, 2017

Since 2005, Nigeria has been experiencing outbreaks of polio that have been restricted to children who have received the polio vaccine, without any other exposure to the virus. The vaccine being used is a/an:

Since 2005, Nigeria has been experiencing outbreaks of polio that have been restricted to
children who have received the polio vaccine, without any other exposure to the virus. The
vaccine being used is a/an:
A. Virosome vaccine
B. Inactivated vaccine
C. Attenuated vaccine
D. Subunit vaccine
E. Conjugated vaccine