Screening Questions Are Usually Asked First to Minimize Fieldwork Costs

question 10

True/False

Screening questions are usually asked first to minimize fieldwork costs or to enhance a study's cost‐effectiveness.

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Definitions:

Allergens

Substances that cause allergic reactions by triggering an immune response in susceptible individuals.

Lymphocytes

White blood cells that circulate through the lymph system and bloodstream, helping the body identify and destroy antigens and cancer cells.

Antigens

Substances that the immune system recognizes as foreign or dangerous, leading to an immune response.

Bacterium

Single-celled microorganisms that are often beneficial but can also cause infections.