Injection has various meanings depending on the context. Here are some examples, categorized for clarity:
Medical Injections
Medical injections, also known as shots, are used to administer medication into the body. Examples include:
- Intravenous (IV): Medication is injected directly into a vein.
- Intramuscular (IM): Medication is injected into a muscle.
- Subcutaneous (SC): Medication is injected under the skin.
- Intradermal (ID): Medication is injected into the dermis (the deeper layer of the skin).
- Intraosseous (IO): Medication is injected directly into the bone marrow.
These injection methods are chosen based on the type of medication and its intended effect. (Source: Medical News Today, Drugs.com, July 30, 2021, April 4, 2021) The route of administration can also influence the speed of action and potential side effects. For example, intravenous injection provides rapid drug delivery.
Injection of Substances (e.g., Waste Disposal)
In the context of environmental science, injection refers to the process of introducing substances into the ground. The U.S. Environmental Protection Agency (EPA) provides information on injection wells used for various purposes. Examples include:
- Injection wells for hazardous waste disposal: These wells are carefully regulated to prevent contamination of groundwater. (Source: EPA, July 10, 2024, March 12, 2024)
- Class V injection wells: These are used for various purposes, including the disposal of wastewater from apartment building septic systems and municipal systems. (Source: EPA)
Injection in Computer Science (SQL Injection)
In computer security, injection refers to a type of attack where malicious code is inserted into an application’s input to manipulate its behavior. A prominent example is:
- SQL Injection: Malicious SQL code is inserted into input fields to alter database queries, potentially leading to unauthorized data access or modification. (Source: PortSwigger Web Security Academy, Imperava, BrightSec) This type of attack can have significant consequences, ranging from data breaches to complete system compromise. There are two main types of SQL Injection: First-order and Second-order. First order happens when user input is directly incorporated into the application's query. Second order happens when user input is stored and later processed. (Source: PortSwigger Web Security Academy)
Injection in Software Development (Dependency Injection)
In software engineering, dependency injection is a design pattern that improves code structure and maintainability. It involves providing dependencies to a class rather than having the class create them directly. (Source: Microsoft Learn, July 18, 2024) This helps to decouple components, making them more testable and reusable.
Injection Drug Use
Sadly, injection is also used in the context of drug abuse, where illegal substances are injected intravenously. This includes but is not limited to: Heroin, cocaine, methamphetamines, and prescription opioids. (Source: Minnesota Department of Health, October 3, 2022) This route of administration often poses significant health risks.
