Question

The blood test for the allergy is used to detect

• A. Cross reactivity
• B. Disease development
• C. Concentration of antibodies in the blood
• D. All of the above

Answer 1

The correct option is D All of the above

• A blood test is used to see if an individuals' blood contains antibodies against a specific substance such as pollen.
• The presence of these specific antibodies against a certain substance means that they are allergic to that substance.
• These antibodies cause rashes, itching, sneezing, and other symptoms that a person experience when they came in contact with the allergen.
• Cross-reactivity means that antibodies produced against a specific antigen (for example- pollen) also have an affinity towards another substance. The blood test can check antibodies for cross-reactivity.

A blood test can also detect if you have any underlying health problems such as anemia, nutritional deficiencies, an infection, and cancer, etc.

So, the correct answer is option D.