CD4 and sexually transmitted disease: Among HIV-related posts seeking advice, 133 posts (16.32%) were regarding tests or clinical signs, including 74 posts (55.64%) specifically related to tests regarding CD4+ T-cell count (n = 27, 20.30%) and self-testing (n = 16, 12.03%), as well as 59 posts regarding clinical signs, such as sexually transmitted diseases (n = 13, 9.77%) (S3 Table).