In the article by O'Connor BA, et al. [Reference O'Connor, Tribe and Givney1], there was an error in the key in Figure 2. The publisher apologises for this error and Figure 2 is shown below with the correct key.
![](https://static.cambridge.org/binary/version/id/urn:cambridge.org:id:binary-alt:20161210082008-97155-mediumThumb-S0950268814001381_fig2g.jpg?pub-status=live)
Fig. 2. Cases of Q fever by week of onset of symptoms and attendance at saleyard, November 2004–January 2005, South Australia.