A study investigates the association between caffeine consum…

A study investigates the association between caffeine consumption (exposure) and migraine headaches (condition). Researchers identify individuals who have migraines and individuals who do not, then ask about their past caffeine intake. What type of study design is this?

A client presents to the clinic with fever, productive cough…

A client presents to the clinic with fever, productive cough, and pleuritic chest pain. The nurse notes the client recently returned from a cruise and developed symptoms within 24 hours of arrival home. Based on this information, which type of pneumonia is most likely?