What type of immunity develops after vaccination or after overcoming a disease?

• A. Acquired immunity
• B. Innate immunity
• C. Passive immunity
• D. Active immunity

Answer: (A)

Immunity that develops after vaccination or after recovering from a disease is acquired immunity. This is the adaptive, learned part of the immune system, where exposure to an antigen prompts specialized cells (like memory B and T cells) to respond more quickly if the same pathogen is encountered again. Vaccination provides a controlled exposure to antigens, training the immune system without illness, and natural infection does the same by building memory from the immune response. Innate immunity, by contrast, is present from birth and is non-specific, while passive immunity comes from antibodies received from another person or animal and is temporary. Active immunity is the process of your own body producing antibodies in response to a challenge, and it sits under the umbrella of acquired immunity. Therefore, the broad term that best fits immunity developed after vaccination or disease is acquired immunity.