one 40 yearsold african woman tested mutiply and all antibody
tests went negative. but she had some typical AIDS
syptoms at that time.then dr asked her to do a PCR,came positive.and also tested some other things ,like CD4,IGG,IGM range.
and then the woman died in 3 months after being discoverd.
you may say this negative situation may cause by late stage HIV. and her immune system was destroyed by AIDS.
but the DR also tested her IGG and IGM ,they were at the normal range.....