Match the following example to an immunity type: 'Recovery from measles infection leading to lifelong immunity' is classified as which type?

What is the primary biological mechanism responsible for the decline of passively transferred antibodies in a recipient over time?

Design a brief immunological explanation for why a live attenuated vaccine often generates longer-lasting protection than an inactivated vaccine. Which combination of mechanisms best explains this difference?

Which of the following correctly matches the terms antigen, artificial active immunity, and zoonosis with their definitions?

Which single statement correctly distinguishes attenuated (live) vaccines from inactivated (killed) vaccines?

Which subunit vaccine type uses an inactivated bacterial toxin as the immunogen?