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Relating to a substance that is capable of destroying or inhibiting the growth of microorganisms, especially bacteria. It describes medications or properties used to treat infections caused by bacteria rather than viruses.

A protective protein produced by the immune system in response to the presence of a foreign substance, called an antigen. It identifies and neutralizes threats like bacteria, viruses, and toxins to prevent infection.

The process by which an individual's immune system becomes protected against a specific disease, typically through the administration of a vaccine. It refers to both the act of giving a vaccine and the resulting state of being immune to an infection.

An injection is the act of putting a liquid, especially a drug, into a person's body using a needle and a syringe. Metaphorically, it refers to the act of introducing something new, such as money or energy, into a system or organization to improve it.

Relating to a medicine or treatment that can only be obtained through a written order from a qualified doctor. It describes items that are legally regulated and require professional authorization rather than being available for direct purchase.

A substance or drug that induces a reversible loss of sensation or consciousness. It is used in medical procedures to prevent a patient from feeling pain during surgery or other painful treatments.

A substance used to stimulate the production of antibodies and provide immunity against one or several diseases. It is typically prepared from the causative agent of a disease or a synthetic substitute and is administered to prevent future infection.

To treat a person or animal with medicine, or to provide a drug to alleviate symptoms and manage health conditions. It describes the professional act of administering healthcare substances or the personal act of self-treating a condition.

A person, typically a male, who has fair or pale yellow hair. While it is more commonly used as an adjective, as a noun it refers specifically to the individual with this hair color.

Describing a substance or quality that tends to calm, soothe, or induce sleep. It is commonly used in medical contexts to describe drugs that reduce excitement or in general contexts to describe anything that has a quietening effect.