Employees who were pregnant, or who were at the time suffering from influenza, colds, fevers or had a skin or kidney disease were excluded from the study due to health risks.
Two important causes of excess deaths during the winter are influenza and cold snaps, although estimating exactly how much can be attributed to each takes more time.
Whereas vector-borne diseases, and to a lesser extent diarrheal diseases, have been the principal focus of discussion, directly transmitted diseases, such as influenza and cold viruses, are likely to change as well.
Unlike influenza and colds, Zika is not transmissible by coughing, touching or sneezing.
Semi-structured interviews, essay questions and group discussions with children included questions on illness perception, on how people catch influenza and colds, and hygiene behaviour.
In clinical trials, healthy subjects that consumed a standardized ginseng extract had a lower incidence of influenza and colds, higher antibody titers, and higher natural killer cell activity [ 17], as well as increased numbers of total lymphocytes and T helper cells [ 18].
Symptomatic participants were asked about the type of disease that they thought to have experienced (e.g., influenza or common cold); we further refer to this as self-reported influenza or common cold.
Most participants expressed the idea of a continuum from "cold" to "influenza (flu)" including "influenza-like illness" in between.
There are other infectious conditions, such as the common cold, influenza, pneumonia, and diarrheal diseases, that can be caught again and again; these seem to contradict the notion of specific immunity.
Virology is a discipline of immediate interest because many human diseases, including smallpox, influenza, the common cold, and AIDS, as well as a host of economically important plant and animal diseases, are caused by viruses.
