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The Global Burden of Disease (GBD) study that the authors reference and model their call to action around is the worlds' largest scientific effort to quantify trends in health. It is lead by the Institute foe Health Metrics and Evaluation (IHME) at the University of Washington. It began in 1990 as a World Bank-commissioned study and is known for having introduced the disability-adujusted life year (DALY) as a new metric to quantify the burden of disease, injuries, and risk factors (or determinants), and enable comparisons. 

The 1990s were  a turning point for global health structures of governance and knowledge production, which the GBD study exemplifies. Global health experts began increasingly reframing health and healthcare in technical terms like DALY, removing health from public governance in ways that complemented and bolstered structural adjustment policies that were introduced in the 1980s (Janes 2004). As a result of these policies, the size, scope and reach of healthcare delivery and public health services were steadily reduced and downgraded. Anthropologists have been critical of these processes and other perceived failures in global health: the collapse of primary care initiatives fostered at Alma Ata in 1978, the resurgence of selective forms of primary care and vertical public health programs, and the ascendency of the World Bank as the principal health policymaking institution (Janes 2004, 2009).

Janes, Craig R (2004). "Going global in century XXI: medical anthropology and the new primary health care." Human Organization 63, no. 4: 457-471.

Janes, C. R., & Corbett, K. K. (2009). Anthropology and global health. Annual Review of Anthropology, 38, 167–183. doi:10.1146/annurev-anthro-091908-164314

The main findings of the article are that the relationship between natural disasters and communicable diseases is not as much due to dead bodies or high trauma as it is to population displacement and a lack of preparredness of the local governing body for the disaster and the crowding of survivors that follows a disaster as this

1: Crowding is shown to be common in displaced populations, and local overpopulation/crowding often facillitates the transmittion of disease

2: Natural disasters that do not cause a displacement of a population are rarely associated with disease outbreaks

3: There is little or no evidence that dead bodies, as some believe, pose a epidemic risk for a population of survivors after a disaster has struck

"The risk for commuicable disease transmission after disasters is associated primarily with the size and characteristics of the population displaced, specifically the proximity of safe water adn functioning latrines, the nutritional status of the displaced population, the level of immunuty to vaccine-preventable diseases..., and the access to healthcare services"

"...natural disasters (regardless of type) that do not result in population displacement are rarely associated with outbreaks"

"When death is directly due to the natural disaster, human remains do not pose a rise for outbreaks"

The main methods that the authors appear to use are reported data from disasters that have happened around the globe, including numbers and types of infections, displacement and crowding data, and knowledge of the disaster incidents examined

Emergency response is addressed in a broad sense of the major risk factors associated with a natural disaster and epidemics. The main points they make are that preparedness, with a focus on availability of safe water and primary healthcare services, along with surveillance for the beginnings of an epidemic, are necessessay for a strong response to a disaster situation   

This article has been referenced in a wide variety of emergency medicine journal articles, ranging from flood protocols, use of cell phones in disaster enviroments, earthquakes and medical complications, to the costs of disaster consequences. Many of the articles referencing this paper appear to go into greater depth for some of the epidemics and diseases that were touched on in the research article. These include hepatitis E, Leptospirosis, cholera, and tetanus.

The object of the study is the evidence in an increase of various types of epidemics (cholera, malaria, menigitis, tetnus, etc) due to displacement of a populatoin from a natural diasaster. Examples of natural disasters discussed include- hurricanes, cyclones, earthquakes and flooding. Despite popular belief (and scientific evidence) deaths due to natural diasters do not spread diasese; unless cause of widespread infection is due to contaminated water sources, malnutrition, residing in a third world country,access to healthcare and adequate bathroom facilities. These points are supported through statistics from the past twenty or more years.

The study is published under emerging infectious diseases from the CDC. The CDC publishes important information about the possibility of widespread infection (such as Zika) and offers ways to avoid outbreak and prevent further infection. The publication is very credible necause the CDC is cited by the government and on various news sources as a way of staying 'safe' from diasese.

The methodology of the study involves looking at past epidemics in the world countries and connect the dots. How did these epedemics happen? Due to a natural disaster? Okay why? Looking at factors that cause each epidemic and trying to discover a parallel. While this is not a new way of studying an issue it is an inventive way because it can be a new way to treat global epidemics: through disaster preparation.