During an outbreak of measles, nurses are giving measles vaccinations to susceptible persons. Which of the following best describes the type of immunity that will follow the administration of these injections?

A. "Having unprotected sex with someone who is infected spreads HIV." HIV is commonly transmitted through unprotected sexual contact with an infected person.

B. "I wouldn't sit next to someone with HIV." HIV is not transmitted through casual contact, such as sitting next to someone, hugging, or sharing food. This response reflects a misunderstanding and indicates a need for more education.

C. "Transfusions of blood products that are contaminated can spread HIV." Although rare in developed countries due to blood screening, contaminated blood transfusions can transmit HIV.

D. "Sharing needles when shooting up drugs spreads HIV." Sharing contaminated needles is a major risk factor for HIV transmission.

A. Clients with HIV infection are encouraged to use condoms to protect sexual partners. This is an example of primary prevention, which aims to prevent disease transmission before it occurs.

B. Health care workers are required to have a tuberculosis skin test or chest X-ray. Secondary prevention involves early detection and screening to identify disease in its early stages before symptoms develop or to prevent progression. TB screening (skin tests or chest X-rays) allows for early identification and treatment, preventing further transmission and severe disease.

C. Health care workers are encouraged to receive annual vaccinations for influenza. This is also primary prevention because vaccinations help prevent initial infection.

D. Clients with HIV infection are given medications to improve immunological response. This represents tertiary prevention, which focuses on managing existing disease to prevent complications.