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
The following diagnostic tests are useful for corresponding purposes except -
assistant
The correct answer is  For any infection (including rubella) IgM antibody alone, without IgG means current (acute) infection.


Ziehl Neelsen staining is used for mycobacteria.


Rapid diagnosis of influenza is made by demonstration of viral antigen in specimens by Immunofluorescence.