As influenza activity has begun to pick up this winter, scientists working on global influenza surveillance increased their estimates of how many people worldwide die annually from the flu.
A study published Dec. 13 in The Lancet estimates that 291,000 to 646,000 people die from respiratory complications related to the flu each year. Previous annual estimates ranged from 250,000 to 500,000 deaths.
“These findings remind us of the seriousness of flu, and that flu prevention should really be a global priority,” Joe Bresee, M.D., the study’s co-author and associate director for global health at the Influenza Division of the Centers for Disease Control, said in a statement.
The new study examined death records and surveillance data from a larger and more diverse set of countries than those providing the previous estimates. Forty-seven countries contributed to the new numbers, which indicate older adults in the poorest regions of the world faced the highest flu-associated deaths.
In the United States, the CDC estimates that about 12,000 to 56,000 people die from flu complications and about 140,000 to 710,000 people are hospitalized due to the flu.
AHCJ medical evidence topic leader Tara Haelle explains in this story in The New York Times why the flu may be more dangerous that people appreciate. The article is a great reference point for journalists covering the flu because she explains in layman’s terms the science behind the flu, the flu vaccine and how the vaccine works.
Public health officials, according to this story in the New England Journal of Medicine, are concerned that more people than usual may get the flu this season because the vaccine was shown to be less effective in countries where the flu season has just ended. The article calls for scientists around the world to boost efforts to develop a universal flu vaccine that doesn’t require an annual shot.
Each year, public health officials estimate which flu strain is likely to circulate and direct vaccine companies to make a vaccine. One of the strains this year didn’t match as well, which reduced its potential effectiveness. Flu vaccines change annually because the virus mutates so quickly.
- AHCJ’s infectious disease page: Background and resources for covering the seasonal flu. Though this Neiman Foundation primer, Covering Pandemic Flu, is about pandemic flu it includes useful resources on understanding the flu and the science.
- In Scientific American, a story, Flu Vaccine Factories Create Errors That Reduce Protection, explores why the current flu vaccine appears to have been less effective.
- The CDC posts and updates data on the flu weekly at FluView.
- For an expert on global flu issues, St. Jude Children’s Research Hospital this week offered media interviews with Richard Webby, a member of the World Health Organization’s global flu surveillance network. AHCJ members can obtain his contact information at our experts page.