Why is In Vivo Experimentation Important in Epidemiology?

In vivo experiments are vital because they allow researchers to observe the natural progression of diseases and the impact of various interventions in a complex biological system. These studies provide invaluable insights into pathogen-host interactions, the effectiveness of vaccinations, and the safety and efficacy of new therapeutic interventions. Unlike in vitro studies, in vivo experiments account for the entire organism's response, including immune system reactions and potential side effects.