People in groups at high risk of complications—such as pregnant women, children under 2 years old, and people with underlying medical conditions—and who are suspected of having swine flu should be treated promptly with antiviral drugs, the World Health Organization said on 12 November.

The updated clinical management guidelines were announced amid an upsurge in cases of pandemic flu in some countries in Europe and Asia.

Previously, WHO guidance focused on how to treat severe cases and …