News and information that led to a peak in Weibo traffic as found in the WeiboScope database, January 1 to December 31, 2012.*

AIDS: Acquired Immunodeficiency Syndrome; CDC: Centers for Disease Control and Prevention; HBV: Hepatitis B virus; HIV: Human Immunodeficiency Virus; TCM: Traditional Chinese Medicine.*Two diseases were excluded from this table as their total numbers of posts were too small: typhus (n = 14) and leishmaniasis (n = 24). We obtained and analyzed the Weibo content of the whole year of 2012 for these two diseases (see S1 File).†Including Weibo posts of health statistics and of news about political figures’ involvement in World AIDS Day.‡One repost of that post was truncated by the Weibo user who posted it, and “mumps” went missing in that post.News and information that led to a peak in Weibo traffic as found in the WeiboScope database, January 1 to December 31, 2012.*