Indoor air pollution is the degradation of indoor air quality by harmful chemicals and other materials; it can be up to 10 times worse than outdoor air pollution. This is because contained areas enable potential pollutants to build up more than open spaces. Statistics suggest that in developing countries, health impacts of indoor air pollution far outweigh those of outdoor air pollution. Indoor air pollution from solid fuels accounted for 3.5 million deaths and 4.5% global daily-adjusted life year (DALY) in 2010; it also accounted for 16% particulate matter pollution.

The meta-analysis was done to assess the effect of zinc on the prevention of acute lower respiratory infections (ALRI). Trials conducted in developing countries, with randomization and double blinding, were included.

This article has estimated the number of tobacco-related deaths in India. Data from the Sample Registration System of the Registrar General of India were used to locate 33 069 women and 41 054 men. These deaths were recorded between 2001 and 2003. The cases were distributed in 1.1 million homes in 6671 small areas chosen randomly from all parts of India.

In this study, the authors attempted to find out whether excess weight in childhood was associated with coronary heart disease (CHD) in adulthood among a large cohort of persons born in Denmark between 1930 and 1976.