[News item] Adults only really catch flu about twice a decade

Don’t think the article is advocating skip the annual flu shots!

Adults only really catch flu about twice a decade, suggests study 

From the release

 

Adults over the age of 30 only catch flu about twice a decade, a new study suggests.

Flu-like illness can be caused by many pathogens, making it difficult to assess how often people are infected by influenza.

Researchers analysed blood samples from volunteers in Southern China, looking at antibody levels against nine different influenza strains that circulated from 1968 to 2009.

They found that while children get flu on average every other year, flu infections become less frequent as people progress through childhood and early adulthood. From the age of 30 onwards, flu infections tend to occur at a steady rate of about two per decade.

Dr Adam Kucharski, who worked on the study at Imperial College London before moving to the London School of Hygiene & Tropical Medicine, said: “There’s a lot of debate in the field as to how often people get flu, as opposed to flu-like illness caused by something else. These symptoms could sometimes be caused by common cold viruses, such as rhinovirus or coronavirus. Also, some people might not realise they had flu, but the infection will show up when a blood sample is subsequently tested. This is the first time anyone has reconstructed a group’s history of infection from modern-day blood samples.”

Dr Steven Riley, senior author of the study, from the Medical Research Council Centre for Outbreak Analysis and Modelling at Imperial, said: “For adults, we found that influenza infection is actually much less common than some people think. In childhood and adolescence, it’s much more common, possibly because we mix more with other people. The exact frequency of infection will vary depending on background levels of flu and vaccination.”

In addition to estimating the frequency of flu infection, the researchers, from the UK, the US and China, developed a mathematical model of how our immunity to flu changes over a lifetime as we encounter different strains of the virus.

Related articles

• New Bird Flu, are you at Risk?
• Rethinking Vaccines: After Age 30 You Get The Flu Just Twice A Decade, While Kids Get Sick Every Other Year
• Estimating the Life Course of Influenza A(H3N2) Antibody Responses from Cross-Sectional Data

Researchers Find “Google Flu Trends” a Powerful Early Warning System for Emergency Departments

Researchers Find “Google Flu Trends” a Powerful Early Warning System for Emergency Departments

From the 1 January 2012 article at newswise

newswise — Monitoring Internet search traffic about influenza may prove to be a better way for hospital emergency rooms to prepare for a surge in sick patients compared to waiting for outdated government flu case reports. A report on the value of the Internet search tool for emergency departments, studied by a team of researchers at Johns Hopkins Medicine over a 21-month period, is published in the January 9 issue of Clinical Infectious Diseases.

The researchers reported a strong correlation between a rise in Internet searches for flu information, compiled by Google’s Flu Trends tool, and a subsequent rise in people coming into a busy urban hospital emergency room complaining of flu-like symptoms….