Nonetheless, just after the US Centers for Disease Control confirmed that HIV can be spread by sperm, cases of infections amongst blood transfusion recipients and amongst intravenous drug users (IDUs) also began showing up, revealing that blood is also a means of transmission.
然而，就在美國疾病管制中心確認 HIV 經由「精液」傳佈後不久，接受輸血的血友病患以及靜脈注射感染者的接續出現，也讓「血液」這個管道現形。