vigi Unit 3

Comparative Observational Studies

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Screenshot 2025 05 02 091502 Comparative Observational Studies

Comparative Observational Studies: Observational studies hold a central and indispensable place in the realm of clinical research and epidemiology. Unlike experimental designs such as randomized controlled trials (RCTs), where researchers deliberately assign exposures to study their effects on outcomes, observational studies passively observe individuals in real-world settings without intervention. This approach reflects actual scenarios and … Read more

Active Surveillance: Pharmacovigilance

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Active Surveillance

While passive surveillance relies on spontaneous or voluntary reporting, active surveillance involves proactive, organized, and systematic efforts to detect, collect, and assess information about adverse drug reactions (ADRs) or vaccine-related events. It is considered more reliable for assessing causality, estimating incidence rates, and evaluating drug safety in specific populations. Active Surveillance Active surveillance is critical … Read more

Passive Surveillance: Pharmacovigilance

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Passive Surveillance

Passive Surveillance in Pharmacovigilance: Pharmacovigilance plays a pivotal role in ensuring the safety of medicinal products, including vaccines, throughout their life cycle. Among the various techniques employed in pharmacovigilance, passive surveillance remains one of the most extensively used due to its feasibility, broad scope, and utility in the early detection of safety signals. Understanding Passive … Read more

Vaccine Safety Surveillance

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Vaccine Safety Surveillance

1. Introduction of Vaccine Safety Surveillance Vaccine Safety Surveillance: Vaccines represent one of the most significant medical achievements in human history, having drastically reduced morbidity and mortality associated with infectious diseases. However, like all medical interventions, vaccines are not completely devoid of risks. Ensuring their safety is a crucial component of public health, particularly in … Read more