Viral and Bacterial Infections

Viral and bacterial infections are caused by different types of microorganisms that invade the body. Bacterial infections are caused by bacteria, which are single-celled organisms that can multiply on their own; examples include strep throat and urinary tract infections. Viral infections are caused by viruses, which are smaller particles that require a host cell to reproduce; common examples are the flu and the common cold. While antibiotics can treat many bacterial infections, they are ineffective against viruses. Both types of infections can cause symptoms like fever, fatigue, and illness, but their causes and treatments differ. Proper diagnosis guides effective treatment.