<s>[INST] hello, my doctor request me to repeat my HBsAg test because my result in my first test is non reactive (gray zone)... My COV= 0.103 and titer= 0.098.... can u please explain to me, im confused? thank you! [/INST] Dear welcome to healthcaremagic Your report seems normal but for reconfirmation your doctor may had planed for examination of HBsAG. there is nothing to worry take care and follow your doctor Thanks </s>