In this issue

The emergence of a new strain of influenza virus (H1N1) in Mexico has raised concerns about a pandemic. Prompt detection of cases is important, so the review of rapid tests for influenza by Hong Foo and Dominic Dwyer is timely.

Changes in the pattern of infectious diseases may result from changes in the global environment. A warming climate will have an effect on prescribing. In addition to the impact on infectious diseases discussed by Timothy Inglis, there will be implications for how medicines are stored and used.

Pharmacogenetic testing has the potential to influence how warfarin is used. Although knowing the patient's genome can help with predicting and adjusting the dose of warfarin, Jennifer Martin explains that pharmacogenetic testing is not yet ready to be part of routine management.