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A viral disease (or viral infection, or infectious disease) occurs when an organism's body is invaded by pathogenic viruses, and infectious virus particles (virions) attach to and enter susceptible cells. Structural characteristics. Basic structural characteristics, such as genome type, virion shape and replication site, generally share the same features among virus species within the same.
Essay on Epidemic Diseases. Article shared by: ADVERTISEMENTS: An epidemic is an occurrence of disease that is temporarily of high prevalence. An epidemic occurring over a wide geographical area is called pandemic. The rise and decline in epidemic prevalence of an infectious disease is a probability phenomenon dependent upon transfer of an effective dose of the infectious agent from an.
Viral disease, disease caused by viruses. Long-term immunity usually follows viral childhood diseases (see chickenpox).The common cold recurs into adulthood because many different viruses cause its symptoms, and immunity against one does not protect against others. Some viruses mutate fast enough to reinfect people after recovery (see influenza) or to keep the immune system from fighting them.
Cross-species virus transmittal had led to the outgrowth of new viral diseases in worlds ( Parrish et al., 2008 ). As discussed in the paper written by Parrish et al., these viral transmittals are making epidemic diseases which result in new public wellness menaces. Several recent illustrations include Ebola fever, terrible acute respiratory syndrome ( SARS ), and grippe.
The most common type of this type of disease is the common cold, which is caused by a viral infection of the upper respiratory tract (nose and throat). A viral disease is an infection caused by a virus, viral diseases are very widespread infections, a type of microorganism. There are many types of viruses that cause a wide variety of viral diseases. Other common viral diseases include.
Infections and infectious diseases are a great burden on many societies, including the countries in the WHO European region. To reduce that burden an integrated approach is required, combining health promotion, disease prevention and patient treatment. The prerequisite for success in this fight is the participation of all health care professionals. Nurses and midwives, as major frontline.
Chapter 2 Disease and disease transmission An enormous variety of organisms exist, including some which can survive and even develop in the body of people or animals. If the organism can cause infection, it is an infectious agent. In this manual infectious agents which cause infection and illness are called pathogens. Diseases caused by pathogens, or the toxins they produce, are communicable.