Which of the following is nonspecific immunity?
A. No longer infected with smallpox after suffering from smallpox
B. Bactericidal effect of lysozyme in tears
C. BCG vaccination to prevent tuberculosis
D. Vaccination to prevent smallpox
Answer:B
Which of the following is nonspecific immunity?
A. No longer infected with smallpox after suffering from smallpox B. Bactericidal effect of lysozyme in tears C. BCG vaccination to prevent tuberculosis D. Vaccination to prevent smallpox