Multiple choice

When a microbe enters our body for the second time, the immune system acts and eliminates it quicker than the first time. This is known as the principle of _________.

  1. immunization

  2. infection

  3. prevention

  4. disease spread

Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

 When a microbe enters our body for the second time, the immune system acts and eliminates it quicker than the first time. This is known as the principle of immunization.