An HIV test reveals infection status by detecting the presence or absence of antibodies to HIV in the blood.
艾滋病毒检测通过检查血液中是否存在艾滋病毒抗体,显示感染状况。
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Babies who are uninfected don't lose their antibodies until the age of 18 months and around 75% of babies with HIVantibodies are actually uninfected by the virus.
The HIVantibodies were discovered in the cells of a 60-year-old African-American gay man, known in the scientific literature as Donor 45, whose body made the antibodies naturally.