Field Trials

Field Trials

Field Trials Experimental studies set out to alter, rather than just observe, relevant exposures of interest, and to assess over time their impact on health status or disease outcomes.  The field trial is the one such type of interventional study designed to evaluate prevention strategies. They are studies carried out “on the ground” or “on the … Read more Field Trials

Cross-Sectional Study

Cross-Sectional Study

Cross-Sectional Study A cross-sectional study (also known as a cross-sectional analysis, transverse study, prevalence study) is a type of observational study that analyzes data from a population, or a representative subset, at a specific point in time. It examines the relationship between diseases (or other health-related states) and other variables of interest as they exist in a defined population at a single … Read more Cross-Sectional Study

Branches of Epidemiology

Branches of Epidemiology

Epidemiology is the study of how the disease is distributed in populations and the factors that influence or determine this distribution. It is defined as “the study of the distribution and determinants of health-related states or events in specified populations and the application of this study to control of health problems.” Information from epidemiologic studies … Read more Branches of Epidemiology

Epidemiology- History, Objectives and Types

Epidemiology- History, Objectives and Types

Epidemiology- History, Objectives and Types Epidemiology, as defined by Last, is “the study of the distribution and determinants of health-related states or events in specified populations, and the application of this study to the prevention and control of health problems”. Epidemiologists are concerned not only with death, illness, and disability, but also with more positive … Read more Epidemiology- History, Objectives and Types

Human Astrovirus

Human Astrovirus

Structure of Human Astrovirus Human astrovirus falls under Astroviridae and genus Mamastrovirus. The particles are round in shape, 28 nm in diameter with a smooth margin and display a five or six pointed star motif on their surface.The term astrovirus (Greek: astron- star) was coined to refer this feature. They are non-enveloped, spherical, capsid of about … Read more Human Astrovirus