Answer:-
A case series study is a type of medical or clinical research that tracks a group of patients with a similar condition or treatment over time. Unlike case-control or cohort studies, it does not include a comparison group, making it purely observational. Researchers analyze patient histories, symptoms, treatments, and outcomes to identify patterns or trends. Case series are useful for studying rare diseases, new treatments, or unexpected side effects. While they provide valuable insights, they have limitations, such as the lack of control groups and potential bias. They often serve as a foundation for further, more detailed research studies.
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