Ringworm is contagious for as long as the fungi spores that cause it remain alive. This may include while a person is undergoing treatment for the infection. Ringworm is a fungal infection that causes ...

R 0, pronounced “R naught” or “R zero,” is a mathematical term that indicates how contagious an infectious disease is. It’s also referred to as the reproduction number. R 0 of 1 means an infection in ...