Influenza vaccine efficacy

In this large case-control study, researchers found the overall efficacy of the influenza vaccine for the 2010-2011 season was 60%. It was highest in children age 6mo-8 years (69%) and lowest in elderly>age 65 (38%) (abstract).

Healthcare workers decline flu vaccinces

According to a survey by the CDC, 86% of physicians and 78% of nurses received a flu vaccine during last flu season. Vaccine rates were 95% among healthcare workers in hospitals that required the vaccine. The most common reasons cited for not getting vaccinated included the belief that it was not necessary, and concerns about efficacy and side effects. All hospitalists should get annual flu vaccination unless contraindicated (CDC site)

H3N2 influenza resurging

The H3N2 influenza swine variant has been confirmed in 16 cases in 3 states in the past month. All cases had prior contact with swine, and there is no evidence of human to human transmission. None were hospitalized or died, and all had typical influenza symptoms. Guidance on prevention and testing can be found here (CDC site)