Скачать или смотреть Allergies /Probability comparison

An allergy is a hypersensitivity immune response to normally harmless substances, such as pollens or foods. For most people, these substances—also called allergens—pose no problem. In allergic individuals, however, the immune system identifies them as a threat and produces an inappropriate (i.e., abnormal) response, Hundreds of ordinary substances may trigger an allergic reaction, in this video you will watch probability which is catching every types of allergy
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