The study of social networks, and in particular the spread of disease on networks, has attracted considerable recent attention in the physics community. In this paper, we show that a large class of standard epidemiological models, the so-called susceptible/infective/removed (SIR) models can be solved exactly on a wide variety of networks. In addition to the standard but unrealistic case of fixe...

Since 2013, highly virulent porcine epidemic diarrhea virus has caused considerable economic losses in the United States. To determine the relation of US strains to those recently causing disease in Germany, we compared genomes and found that the strain from Germany is closely related to variants in the United States.

ous and extensive outbreaks of typhus during the war in various countries, both of the West and the East, led to intensive study of this disease and its vector the louse. This study led, not unnaturally, to the recognition of other clinical entities, resembling the classical typhus in some of its manifestations, but obviously existing under conditions which precluded the usual role of the louse...

the most urgent public health problem today is to devise effective strategies to minimize the destruction caused by the aids epidemic. mathematical models based on the underlying transmission mechanisms of the aids virus can help the medical/scientific community understand and anticipate its spread in different populations and evaluate the potential effectiveness of different approaches for bri...

hiv/aids epidemic is concentrated among injecting drug users in iran. like many other countries with hiv/aids concentrated epidemic, prisons are high risk areas for spreading hiv/aids. the aim of this paper was to study the trend of hiv/aids prevalence and related interventions administered in prisons of iran during a 13 years period.this cross sectional study was conducted using the data colle...

results bahaodowle razi, a persian physician from the 15th century anno domini (ad), reported two epidemics in harat and one in rey (inold persia) for the first time, one century before baillou. he named it as sorfe-ie-am (meaning public cough). those occurred during his lifetime. explaining about his observations and experiences about this epidemic, bahaodowle razi elaborated on prognosis, sym...

Received: October 28, 2004 Accepted: January 26, 2005 Porcine epidemic diarrhea virus (PEDV), an enveloped, singlestranded RNA virus1,2 in the family Coronaviridae, causes severe diarrhea in swine. The main and only obvious clinical sign of porcine epidemic diarrhea (PED) is watery diarrhea. Mortality may be as high as 80%, but averages 50%.3,4 Piglets up to 1 week of age may die from dehydrati...