A dead or weakened pathogen used to establish immunity would most likely be found in?

Hello there.

A dead or weakened pathogen used to establish immunity would most likely be found in?

a vaccine

The choices can be found elsewhere and as follows:

1 a pesticide

2 an antibiotic

3 a vaccine

4 a toxin

The correct answer is option 3. A dead or weakened pathogen used to establish immunity would most likely be found in a vaccine. A vaccine typically contains an agent that resembles a disease-causing microorganism and is often made from weakened or killed forms of the microbe, its toxins or one of its surface proteins.