Question

Active immunity is acquired by:

• A. Administration of Immunoglobulin
• B. Transferring of antibodies across placenta
• C. Following subclinical infection like Polio and Diphtheria
• D. Administration of antisera or anti-toxins

Hint:

Active immunity provides long-lasting protection, whereas passive immunity offers temporary protection.

Answer 1

The Correct Option is C

Step 1: Understand active immunity.
Active immunity develops when the body's immune system responds to a pathogen, either through natural infection (e.g., Polio and Diphtheria, including subclinical cases) or vaccination.
- In contrast, passive immunity involves the transfer of antibodies (e.g., immunoglobulin or anti-toxins), providing short-term protection.