2 doctors weighed in:
Can an HIV antibody screening test be positive but the western blot negative?
2 doctors weighed in

Dr. Joel Gallant
Internal Medicine - Infectious Disease
1 doctor agrees
In brief: Yes
There are 2 reasons for this kind of result: (1) a false positive, or (2) early infection before seroconversion.
In someone at low risk for HIV without symptoms, another negative WB in 1 month means there's no infection. In someone at risk or with symptoms of acute infection, a viral load can be helpful. The new 4th generation antigen/antibody tests will eliminate this problem.

In brief: Yes
There are 2 reasons for this kind of result: (1) a false positive, or (2) early infection before seroconversion.
In someone at low risk for HIV without symptoms, another negative WB in 1 month means there's no infection. In someone at risk or with symptoms of acute infection, a viral load can be helpful. The new 4th generation antigen/antibody tests will eliminate this problem.
Dr. Joel Gallant
Dr. Joel Gallant
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