Molluscum contagiosum virus (MCV) particles, coloured transmission electron micrograph (TEM). MCV is a poxvirus that causes molluscum contagiosum in humans, producing many small raised lesions on the skin. This virus consists of a DNA (deoxyribonucleic acid) core in a protein coat, or capsid, surrounded by an envelope. Molluscum contagiosum usually clears up in a few months but may require medical treatment. Magnification: x41,500 when printed 10 centimetres tall.