Why does pharmacovigilance rarely recruit people?

Only recruit experienced talents. Undergraduate, master and doctor will recruit, but the level of work is different. The entry threshold for undergraduate courses is very high. Generally, undergraduates are rarely recruited, unless you graduated from a prestigious school or are very short of people (for example, many internships/jobs have been selected, but due to the epidemic, enterprises may select students who have submitted resumes before contacting them), or have a strong background (scientific research, school, contacts), or