Vaccination against malaria is not possible because …………………
A. they produce antibodies and antitoxins
B. they do not produce antibodies and antitoxins
C. antibodies resistant to vaccines are produced
D. none of these
Answer:B
Vaccination against malaria is not possible because …………………
A. they produce antibodies and antitoxins B. they do not produce antibodies and antitoxins C. antibodies resistant to vaccines are produced D. none of these