Thank you for visiting nature.com. You are using a browser version with limited support for CSS. To obtain
the best experience, we recommend you use a more up to date browser (or turn off compatibility mode in
Internet Explorer). In the meantime, to ensure continued support, we are displaying the site without styles
and JavaScript.
This issue features articles on Parkinson’s, dental implants, and health education.
Cover image: Oral bacteria. Coloured scanning electron micrograph (SEM) of mixed oral bacteria attached to a buccal cell (pink) from the cheek. The mouth contains a large number of bacteria, most of which are harmless or even beneficial. However, some bacteria can cause throat infections or cause the formation of plaque deposits on the teeth, which may lead to decay. Magnification: x6500 at 10 cm high.