Immunotherapies can be active, where they are intended to induce or support an immune response in the patient, or passive , where immune components, such as antibodies or cytokines are introduced from the outside. A placebo treatment or sham procedure. The time interval between the initial infection and appearance of the first clinical symptom or sign of disease. Also, in terms of drug approval, the exact cause or purpose for which a drug is approved by the FDA to be prescribed. A test where saline mist is breathed to induce a cough.
Resultant sputum is then cultured or stained to look for microorganisms, often pneumocystis carinii.
The initiation of a particular therapy. Infection may or may not lead to clinical disease. Capable of being transmitted by infection, with or without actual contact. Something seeping or filling in a space or cavity. The voluntary consent given by a patient to participate in a study after being informed of its purpose, method of treatment, procedure for assignment to treatment, benefits and risks associated with participation, and required data collection procedures and schedule.