Final answer:
The subject of the question is the administration of injections for treating infections, comparing routes like intravenous, intramuscular, and subcutaneous with oral and topical methods, especially considering home administration convenience.
Step-by-step explanation:
The question relates to the administration routes for injections used for treating infections, specifically when oral absorption is insufficient, and how these routes are utilized in healthcare settings versus home administration. In clinical settings, intravenous (IV) or intramuscular (IM) injections might be preferred due to the higher plasma levels that can be achieved, which is particularly important in treating systemic infections. However, for home administration, oral and topical routes are usually the most convenient. Injectable routes like Z-track technique (an IM injection method to prevent tracking of the medication through the subcutaneous tissue) and subcutaneous (SQ) injections are sometimes used at home but are less common than oral and topical treatments.