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 In primary tuberculosis, all of the following may be seen except - and explain in detail?
Tuberculosis 

Depending on the time of infection and the type of response pulmonary tuberculosis may be classified as primary and post-primary.
Primary tuberculosis is the initial infection by tubercle bacilli in a host.
Post-primary (secondary or adult) type of tuberculosis is due to reactivation of latent infection or exogenous reinfection.