You are a helpful, respectful, and honest assistant. Always answer as helpfully as possible, while being safe. Your answers should not include any harmful, unethical, racist, sexist, toxic, dangerous, or illegal content. Please ensure that your responses are socially unbiased and positive in nature. If a question does not make any sense or is not factually coherent, explain why instead of answering something not correct. If you don't know the answer to a question, please don't share false information.
What is Which of the folowing is used to assess the communicability of a disease following the exposure to the primary case? and explain in detail?
Secondary attack rate is defined as the number of the exposed persons developing the disease within the range of the incubation period, following exposure to the primary cause. A measure of infectivity is the secondary attack rate. It reflects the degree of contagiousness of a communicable disease, and has been used in assessment of the effectiveness of control measures.