Share 'Qs people asked me on science and my replies to them - part 216'

Q: Is TB (tuberculosis) a disease or an infection?   Krishna: Infection, often the first step, occurs when bacteria, viruses or other microbes that cause disease enter your body and begin to multiply. Disease occurs when the cells in your body are damaged — as a result of the infection — and signs and symptoms of an illness appear.  Tuberculosis (TB) is a potentially serious infectious disease th…