A vaccine that is attenuated contains bacterial or viral cells that ________.
A. show a shift to the left
B. are abnormally small
C. have been weakened
D. contain antibodies
Answer:C
A vaccine that is attenuated contains bacterial or viral cells that ________.
A. show a shift to the left B. are abnormally small C. have been weakened D. contain antibodies
Explanation: A) Shift to the left refers to a peripheral blood smear, not a vaccine.