👉 Immediate infection, also known as primary infection, occurs when a pathogen (such as bacteria, viruses, fungi, or parasites) enters the body and begins to multiply and cause disease almost instantly or very shortly after entry. This rapid onset is due to the direct interaction of the pathogen with host tissues, often bypassing initial immune defenses. For example, a cut or abrasion can quickly become infected by bacteria, leading to symptoms like redness, swelling, and pain within minutes or hours. The immediate nature of this infection highlights the critical importance of prompt medical intervention to prevent complications and treat the underlying cause effectively.
