[Vaccines: adverse events surveillance].

Area of Science:

• Pharmacovigilance
• Immunization Safety
• Public Health Surveillance

Background:

• Vaccine adverse event surveillance is crucial for monitoring post-vaccination events.
• Ensuring vaccine safety is paramount for public health and vaccine acceptance.
• Surveillance systems aim to detect and evaluate potential vaccine-related adverse events.

Purpose of the Study:

• To review major vaccine adverse event surveillance systems globally.
• To compare the methodologies and effectiveness of different systems.
• To highlight the advantages and limitations of specific surveillance programs, including the Chilean system.

Main Methods:

• Review of existing literature on vaccine adverse event surveillance systems.
• Comparative analysis of passive (spontaneous reporting) and active (follow-up) surveillance strategies.
• Case study commentary on the Chilean vaccine adverse event surveillance system.

Main Results:

• Passive surveillance, such as the US Vaccine Adverse Events Reporting System (VAERS), is widely adopted.
• Active surveillance offers more detailed data but is resource-intensive.
• The Chilean system presents unique advantages and limitations in its approach to vaccine safety monitoring.

Conclusions:

• Effective vaccine adverse event surveillance is essential for maintaining public trust and vaccine safety.
• Different global systems (e.g., US VAERS, Canadian, European, Chilean) have varying strengths and weaknesses.
• Continuous evaluation and improvement of surveillance systems are necessary to adapt to new vaccines and potential safety signals.