A multinational, prospective clinical study was carried out in South-East Asia (SEA) and Latin America (LA), to ascertain the proportion of inapparent dengue infections in households of febrile dengue cases, and to compare clinical data and biological markers from subjects with various dengue disease patterns. Dengue infection was laboratory-confirmed during the acute phase, by virus isolation and detection of the genome. The four participating reference laboratories used standardized methods.

By granting rights to Nature, Bolivia and Ecuador have subverted conventional wisdom on the use of natural resources. (Editorial)

Scientific evidence suggests that increasing amounts of carbon in the atmosphere are causing climate change that will result in global warming, sea -level rise and more extreme weather events. In response to anthropogenic climate change, market-based mechanisms have been proposed to mitigate these rising carbon dioxide emissions. One of these mechanisms is known
as REDD (Reduction of Emissions from Deforestation and forest Degradation). It works to prevent the loss of forests that play a key role in sequestering carbon and regulating the global climate.

Biotechnology offers many benefits, but only nineteen developing countries have commercially approved the planting of genetically engineered crops. Outreach and educational programmes could help prepare stakeholders in developing countries to influence biotechnology policies. Faculty at Michigan State University (MSU) developed a two-week course that was taught 14 times from 2002 to 2010 for 251 participants from 58 countries.

The collapse of the Maya civilization is often attributed to drought, but is the explanation really as simple as that? On the basis
of evidence from their respective fields, an archaeologist and a palaeoclimatologist call for a more nuanced assessment.