BACKGROUND The spatial-temporal dynamics of Bordetella pertussis remains as a highly interesting case in infectious disease epidemiology. Despite large-scale vaccination programs in place for over 50 years around the world, frequent outbreaks are still reported in many countries. METHODS Here, we use annual time series of pertussis incidence from the thirteen different regions of Chile (1952-...

background: gastrointestinal and liver diseases (gild) constitute a noteworthy portion of causes of death and disability in iran. however, data on their prevalence and burden is sparse in iran. the global burden of disease (gbd) study in 2010 has provided invaluable comprehensive data on the burden of gild in iran methods: estimations of death, years of life lost due to premature death (yll), y...

BACKGROUND Fertility is one of the three principal components of population dynamics. High fertility and rapid population growth exert negative influences on economic and social development. This study was aimed to estimate the level and trends of fertility among (15-49 years) old women in kersa demographic surveillance and health research center, kersa district Eastern Ethiopia. METHODS The ...

AIMS To examine the relation between birth weight and cognitive function at age 11 years, and to examine whether this relation is independent of social class. METHODS Retrospective cohort study based on birth records from 1921 and cognitive function measured while at school at age 11 in 1932. Subjects were 985 live singletons born in the Edinburgh Royal Maternity and Simpson Memorial Hospital...