|Clinical pathologists are doctors with special training who often direct all of the special divisions of the laboratory, which may include the blood bank, clinical chemistry and biology, toxicology, hematology, immunology and serology, and microbiology. Clinical pathology helps in understanding the microbial growth, its morphological and structural alterations within the body. The pathological examinations are done on bodily fluids such as blood, serum and saliva. Immunopathology is the science provides the knowledge on immune responses to infections. Open access to the scientific literature means the removal of barriers (including price barriers) from accessing scholarly work. There are two parallel roads towards open access: Open Access articles and self-archiving. Open Access articles are immediately, freely available on their Web site, a model mostly funded by charges paid by the author (usually through a research grant). The alternative for a researcher is self-archiving (i.e., to publish in a traditional journal, where only subscribers have immediate access, but to make the article available on their personal and/or institutional Web sites (including so-called repositories or archives)), which is a practice allowed by many scholarly journals. Open Access raises practical and policy questions for scholars, publishers, funders, and policymakers alike, including what the return on investment is when paying an article processing fee to publish in an Open Access articles, or whether investments into institutional repositories should be made and whether self-archiving should be made mandatory, as contemplated by some funders.