| Share | Cite. Naturally acquired active immunity occurs when the person is exposed to a live pathogen, develops the disease, and becomes immune as a result of the primary immune response.Artificially acquired active immunity can be induced by a vaccine, a substance that contains the antigen.A vaccine stimulates a primary response against the antigen without causing symptoms of the disease (see vaccination).rtificially acquired active immunity can be induced by a vaccine, a substance that contains the antigen. A vaccine stimulates a primary response against the antigen without causing symptoms of the disease (see vaccination).
Equanimity is defined as being calm and maintaining your emotions, especially in bad situations. An example of equanmity is when you react calmly when you are given bad news about your health or your job. the quality of remaining calm and undisturbed; evenness of mind or temper; composure. Origin of equanimity.
The extremity of a situation or of someone's behaviour is the degree to which it is severe, unusual, or unacceptable. In spite of the extremity of her seclusion she was sane. [+ of] In the past, the region had been protected by its forbidding geography and the extremities of its climate. [+ of] Only in extremity, when his defences had been reduced by six weeks of bombing, was he ready to leave. More Synonyms of extremity COBUILD Advanced English Dictionary.