Daily Brief: 2017.1.9


Influenza A H3N2

According to the Centers for Disease Control and Prevention (CDC), all states across the United States are reporting influenza outbreaks. The proportion of people seeing their health care provider for influenza-like-illness is above the national baseline for the second consecutive week this season.
(Sources: NBC NewsInfection Control Today)

So far this year, the most common strain of influenza circulating is Influenza A H3N2. The strain is reportedly known to cause more severe illness, especially in young children and people 65 and older. Influenza A H3N2 variant viruses were first detected in people in July 2011. The viruses were first identified in U.S. pigs in 2010. During 2011, 12 human infections with H3N2v were detected. During 2012, there were multiple outbreaks of H3N2v resulting in 309 reported cases.
(Sources: CDCCBS News)

According to the CDC report, the flu is most widespread in California, Washington, Oregon and Idaho, as well as in parts of the northeast and mid-Atlantic. Hospitals in Washington state have also been hit hard, with people suffering from flu and other winter infections.
(Source: NBC News)


  1. The first and most important step in preventing flu is to get a flu vaccination each year.
  2. Vaccination is especially important for people at higher risk of serious influenza complications, and for people who live with or care for high risk individuals.
  3. CDC also recommends everyday preventive actions such as staying away from people who are sick, covering coughs and sneezes and frequent handwashing.
    (Sources: CDCWHO)