Authors' reply

摘要

We thank Duncan Smith-Rohrberg and colleagues and Stephen Lawn and co-workers for their comments concerning our algorithm and their pledge for the availability of more viral load testing in resource-limited settings. For the moment, however, we have to confront the reality faced by most countries struggling with antiretroviral treatment scale-up: viral load testing remains expensive, requires a well-equipped laboratory, well-trained personnel, and is not available in most resource-limited settings.