AIDS risk and prevention in transfusions

Area of Science:

• Transfusion Medicine
• Virology
• Public Health

Background:

• Blood transfusions historically represented a significant route for Human Immunodeficiency Virus (HIV) transmission, accounting for 2-8% of Acquired Immunodeficiency Syndrome (AIDS) cases.
• The advent of HIV identification and antibody detection tests, alongside autologous transfusion strategies and viral inactivation methods for clotting factor concentrates, has substantially reduced this transmission pathway.

Purpose of the Study:

• To highlight the ongoing complexities in ensuring transfusion safety despite advancements in HIV detection and prevention.
• To emphasize the critical need for hemotherapy services to maintain vigilance regarding donor screening and adopt new technologies.

Main Methods:

• Review of historical data on HIV transmission via blood products.
• Analysis of the impact of diagnostic test sensitivity and ""immunologic windows"" on transfusion safety.
• Consideration of emerging viral threats, such as HIV-2, and their implications.

Main Results:

• Significant reduction in HIV transmission through blood transfusions due to improved screening and inactivation techniques.
• Persistent challenges include variations in test sensitivity, the existence of ""immunologic windows"" (periods when infection is undetectable), and the emergence of new viral strains like HIV-2.

Conclusions:

• Hemotherapy services worldwide must remain aware of potential risks and implement rigorous donor exclusion protocols.
• Continuous education of healthcare professionals and the development of advanced techniques are paramount for guaranteeing transfusion safety and preventing transfusion-transmitted HIV infections.