Infectious diseases are caused by pathogenic microorganisms, such as viruses, bacteria, parasites, or fungi. For almost any infectious human disease, what one person does about it affects the probability that other people get infected. Some infectious diseases spread from person to person through direct physical contact as in the case of sexually transmitted infections. People
Introduction The first recorded mathematical model describing a communicable disease was constructed by the Swiss mathematician Daniel Bernoulli and read at the Royal Academy of Sciences in Paris in 1760. His model aimed to evaluate the impact on human life expectancy at birth if smallpox were to be eliminated as a cause of death through
Infection refers to the successful transmission of a microorganism (bacterium, virus, fungus, or parasite) to the host, with subsequent multiplication of the microorganism (infectious agent). The host response to infections is highly variable and depends on the relationship between host and infectious agent. An infection may be subclinical (unapparent) or may result in disease. The