system
Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
ELISA is performed on a population with low prevalence. What would be the result of performing double screening ELISA tests -
assistant
The correct answer is  The specificity of ELISA can be increased by carrying out ELISA in a row (series) using different HIV markers.
When screening test is used in a series mode : -


↑ Specificity
↑ PPV
↓ Sensitivity