In C++, a bool variable can hold only the values true or false.

Which viral family is medically important and causes influenza?

Sally age 27 needs to provide her new employer proof of immunity to Hep B. She states she had the Hep B series in Middle school but no record. Which lab test do you draw no Sally to prove she has immunity to Hep B?

The diagnostic criteria for Obsessive-Compulsive Disorder include all of the following except:

**Chronic kidney disease (CKD) may have vague complaints.  Which of the following are possible complaints of CKD?  

A 65-year-old previously healthy, active woman is going to have surgery on a painful bunion. She was referred by the surgeon and needs pre-operative clearance. On review of symptoms, she denies cardiovascular symptoms. She is active in silver sneakers and swims at the YMCA 45 minutes, 3 days a week. Her BP is 130/70. Her HR is 70 beats/min. The EKG is normal sinus rhythm. She does not take any medications.  What are your recommendations?  

**What is the definitive test for diagnosis of obstructive sleep apnea

** According to the American Academy of Sleep Medicine (AASM) clinical practice guidelines for diagnosing obstructive sleep apnea (OSA), what is the recommended diagnostic strategy for an adult who presents with symptoms suggestive of moderate to severe OSA and does not have significant cardiopulmonary comorbidities?

A healthy, 38 year old male suddenly develops a fast irregular heart beat, consistent with atrial fibrillation. A thorough history is obtained to elicit any possible precipitating causes. Which of the following initial diagnostic tests is NOT necessary?

78 year old, Bertha has persistent atrial fibrillation, rate controlled in the 70 beat per minutes range, which class of medication should considered?