Bacterial and viral infections differ in cause, treatment, and behavior. Bacterial infections are caused by bacteria, which are living organisms that can reproduce independently. They often respond to antibiotics, such as
ceftriaxone injection, which target bacterial cell structures. Viral infections are caused by viruses, which require host cells to replicate and do not respond to antibiotics. Instead, they are managed with antiviral drugs or supportive care. Bacterial infections may produce localized symptoms like pus, while viral infections cause systemic symptoms like fever and fatigue. Accurate diagnosis is essential because misuse of antibiotics can lead to resistance and ineffective treatment outcomes.