Info Clinic

Infectious Diseases

Infectious diseases covers viruses and bacteria: measles, hepatitis B and C, tuberculosis, Lyme disease after a tick bite and food poisoning. We explain how these infections spread, how they are detected and how vaccines and prevention protect you. The content is for reference and does not replace a doctor's examination.

Gloved hand holds a blood sample tube against an illustration of viruses, a theme of infectious diseases

Conditions

Anatomical skeleton model in front of a chest X-ray, the kind of image used to examine lungs for tuberculosis

Tuberculosis: Why It Is Still With Us, Signs and Risk Groups

Tuberculosis remains the leading cause of death from a single infectious agent. We break down the latent and active forms, transmission, symptoms, risk groups, diagnosis, and the multidrug-resistant form.

3 min · updated October 31, 2026