The decision to make certain items free each week is one made by our editors on a case-by-case basis. Often the full text of an article is made free due to immediate public health concerns, or because it will be of interest to a wider audience than that regularly accessing our content. If an article was free at the time of publication, we make the Correspondence free when it is published. In addition, we publish two Images in Clinical Medicine each week – one in print and the other online only – and the online-only Image is always free. We try to make something free every week; some weeks there is more free content than others.