When my HIV test results returned positive, I was shocked and confused. (Para.7)
Please pay attention to the verb "return" here. The verb is used here as a link verb, expressing the state of things or persons when they return.
They returned healthy and strong from their travel. 旅行归来，他们显得又健康又强壮。
She left her hometown only a girl of 13 but returned a well-trained doctor. 她离开家乡时，只是一个13岁的女孩，可回来时已是一位训练有素的医生了。