Featured Research

from universities, journals, and other organizations

Pandemic H1N1 influenza vaccine effective in 2009-10 flu season

Date:
January 13, 2011
Source:
Public Library of Science
Summary:
One dose of the pandemic flu vaccines used in seven European countries conferred good protection against pandemic H1N1 influenza in the 2009-10 season, especially in people aged less than 65 years and in those without any chronic diseases.

One dose of the pandemic flu vaccines used in seven European countries conferred good protection against pandemic H1N1 influenza in the 2009-10 season, especially in people aged less than 65 years and in those without any chronic diseases. These findings from a study funded by the European Centre for Disease Prevention and Control (ECDC) and coordinated by EpiConcept, Paris, France, published in this week's PLoS Medicine, give an indication of the vaccine effectiveness for the influenza A (H1N1) 2009 strain included in the 2010-11 seasonal vaccines.

The authors conducted a multi-centre case-control study based on practitioner surveillance networks from seven countries -- France, Hungary, Ireland, Italy, Romania, Portugal and Spain. Patients consulting a participating practitioner for influenza-like-illness had a nasal or throat swab taken within eight days of symptom onset. Individuals were considered vaccinated if they had received a dose of the vaccine more than 14 days before the date of onset of influenza like illness and unvaccinated if they were not vaccinated at all or if the vaccine was given less than 15 days before the onset of symptoms.

The authors analysed pandemic influenza vaccination effectiveness in those vaccinated less than 8 days, those vaccinated between, and including, 8 and 14 days and those vaccinated more than 14 days before onset of symptoms compared to those who had never been vaccinated. The authors then used statistical models to measure the effectiveness of pandemic influenza vaccine according to three age groups (< 15, 15-64, and 65+ years of age) and the presence of chronic diseases. These results obtained during the late phase of the pandemic suggest good protection with the pandemic H1N1 vaccine (vaccine effectiveness estimates between 65% and 100%). The findings also suggest that the 2009-10 seasonal influenza vaccine (as opposed to the pandemic H1N1 vaccine) did not protect against pandemic H1N1 influenza illness.

The authors said: "The late availability of the pandemic vaccine and subsequent limited coverage with this vaccine hampered our ability to study vaccine benefits during the outbreak period." They added: "Future studies should include estimation of effectiveness of the new trivalent vaccine in the 2010-2011 season, when vaccination will occur before the influenza season starts."

Bruno C. Ciancio, senior influenza expert from ECDC -- who conceived the idea of a European network to measure influenza vaccine effectiveness and collaborated to design the study- stressed: "This study showed the added value of collaboration at European level as concerns vaccine evaluation. In addition, the results obtained are especially important for European countries this season, considering that the predominant influenza strain currently circulating across Europe is influenza A (H1N1).''


Story Source:

The above story is based on materials provided by Public Library of Science. Note: Materials may be edited for content and length.


Journal Reference:

  1. Marta Valenciano, Esther Kissling, Jean-Marie Cohen, Beatrix Oroszi, Anne-Sophie Barret, Caterina Rizzo, Baltazar Nunes, Daniela Pitigoi, Amparro Larrauri Cαmara, Anne Mosnier, Judith K. Horvath, Joan O'Donnell, Antonio Bella, Raquel Guiomar, Emilia Lupulescu, Camelia Savulescu, Bruno C. Ciancio, Piotr Kramarz, Alain Moren. Estimates of Pandemic Influenza Vaccine Effectiveness in Europe, 2009–2010: Results of Influenza Monitoring Vaccine Effectiveness in Europe (I-MOVE) Multicentre Case-Control Study. PLoS Medicine, 2011; 8 (1): e1000388 DOI: 10.1371/journal.pmed.1000388

Cite This Page:

Public Library of Science. "Pandemic H1N1 influenza vaccine effective in 2009-10 flu season." ScienceDaily. ScienceDaily, 13 January 2011. <www.sciencedaily.com/releases/2011/01/110111171839.htm>.
Public Library of Science. (2011, January 13). Pandemic H1N1 influenza vaccine effective in 2009-10 flu season. ScienceDaily. Retrieved September 30, 2014 from www.sciencedaily.com/releases/2011/01/110111171839.htm
Public Library of Science. "Pandemic H1N1 influenza vaccine effective in 2009-10 flu season." ScienceDaily. www.sciencedaily.com/releases/2011/01/110111171839.htm (accessed September 30, 2014).

Share This



More Health & Medicine News

Tuesday, September 30, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

How 'Yes Means Yes' Defines Sexual Assault

How 'Yes Means Yes' Defines Sexual Assault

Newsy (Sep. 29, 2014) — Aimed at reducing sexual assaults on college campuses, California has adopted a new law changing the standard of consent for sexual activity. Video provided by Newsy
Powered by NewsLook.com
Scientists May Have Found An Early Sign Of Pancreatic Cancer

Scientists May Have Found An Early Sign Of Pancreatic Cancer

Newsy (Sep. 29, 2014) — Researchers looked at 1,500 blood samples and determined people who developed pancreatic cancer had more branched chain amino acids. Video provided by Newsy
Powered by NewsLook.com
Colo. Doctors See Cluster of Enterovirus Cases

Colo. Doctors See Cluster of Enterovirus Cases

AP (Sep. 29, 2014) — Doctors at the Children's Hospital of Colorado say they have treated over 4,000 children with serious respiratory illnesses since August. Nine of the patients have shown distinct neurological symptoms, including limb weakness. (Sept. 29) Video provided by AP
Powered by NewsLook.com
Dr.'s Unsure of Cause of Fast-Spreading Virus

Dr.'s Unsure of Cause of Fast-Spreading Virus

AP (Sep. 29, 2014) — Doctors at the Children's Hospital of Colorado say they have treated over 4,000 children with serious respiratory illnesses since August. Nine of the patients have shown distinct neurological symptoms, including limb weakness. (Sept. 29) Video provided by AP
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
 
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:  

Breaking News:

Strange & Offbeat Stories

 

Health & Medicine

Mind & Brain

Living & Well

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:  

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile iPhone Android Web
Follow Facebook Twitter Google+
Subscribe RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins