scholarly journals Risk groups and other target groups – preliminary ECDC guidance for developing influenza vaccination recommendations for the season 2010-11

2010 ◽  
Vol 15 (12) ◽  
Author(s):  
H Nokleby ◽  
A Nicoll
Keyword(s):  
Influenza Vaccination ◽  
Influenza A ◽  
Seasonal Influenza ◽  
H1n1 Virus ◽  
Risk Groups ◽  
Evidence Based ◽  
Target Groups ◽  
Rigorous Approach ◽  
Vaccination Recommendations ◽  
Influenza A H1n1

Providing guidance on risk and target groups for seasonal influenza immunisation is difficult for the 2010-11 season since there is no experience with the new influenza A(H1N1) virus in its seasonal form. Arguments exist for offering immunisation to people with chronic illness and older people, and also for other risk and target groups including pregnant women. A more rigorous approach is being developed to produce annual evidence-based guidance on risk and target groups for influenza vaccination.

scholarly journals Trends in influenza vaccination behaviours – results from the CoPanFlu cohort, France, 2006 to 2011

2013 ◽  
Vol 18 (45) ◽  
Author(s):  
A L Caille-Brillet ◽  
J Raude ◽  
N Lapidus ◽  
X De Lamballerie ◽  
F Carrat ◽  
...  
Keyword(s):  
Risk Factors ◽  
Influenza Vaccination ◽  
Pandemic Influenza ◽  
Influenza A ◽  
Seasonal Influenza ◽  
General Trend ◽  
Vaccine Coverage ◽  
Risk Groups ◽  
Influenza A H1n1 ◽  
Negative Effect

Controversies over the effectiveness and safety of the pandemic influenza A(H1N1)pdm09 vaccine in 2009/10 may have altered the influenza vaccination coverage in France after the pandemic season. The purpose of this study was to determine whether the pandemic affected seasonal influenza vaccination behaviours in the general population by analysing vaccination behaviours from 2006/07 to 2011/12 among the 1,451 subjects of the Cohort for Pandemic Influenza (CoPanFlu) France. We found that vaccination behaviours in 2010/11 and 2011/12 significantly differed from behaviours before the pandemic, with the notable exception of the targeted risk groups for seasonal influenza-related complications. Among the population with no risk factors, the post-pandemic influenza vaccine coverage decreased, with people aged 15 to 24 years and 45 to 64 years being most likely to abandon vaccination. Therefore, this study documents a moderate negative effect of the 2009/10 pandemic episode on vaccination behaviours in the French metropolitan population that was apparent also in the following two seasons. Moreover, it does not exclude that the general trend of reduced vaccination has also affected certain targeted groups at high risk for complications.

scholarly journals The 2018-19 influenza season in Afghanistan: Epidemiology and Virology

2020 ◽  
Author(s):  
Mohammad Nadir Sahak ◽  
Fatima Arifi ◽  
Aspen A Hammond ◽  
Henry J Laurenson-Schafer ◽  
Sayed Ataullah Saeedzai ◽  
...  
Keyword(s):  
Influenza Virus ◽  
Influenza Vaccination ◽  
Influenza A ◽  
Seasonal Influenza ◽  
Risk Groups ◽  
Influenza Surveillance ◽  
Limited Information ◽  
Severe Acute Respiratory Infection ◽  
Influenza A H1n1 ◽  
Hospital Visits

Abstract Objective This paper aims to provide information on epidemiology and virology of seasonal influenza for the 2018-19 season, and build upon limited information for developing influenza vaccination policy for risk groups in Afghanistan. Methods This paper is based on a retrospective analysis of Afghanistan influenza surveillance data, both from influenza-like illness (ILI) and severe acute respiratory infection (SARI) cases during the 2018-19 season. The data for 2018-19 has also been compared to the data of the previous two seasons (2016-2017 and 2017-2018). Results During the 2018-19 season, a total number of 10,604 ILI and 5,261 SARI cases were reported to the national influenza sentinel surveillance system. From week 48 2018 to week 14 2019, a total of 713 ILI specimens were tested for influenza virus, and 10.7% were positive with majority influenza A(H1N1)pdm09 virus (57%). Similarly, a total of 1,004 SARI specimens were tested for influenza virus during this period, and 11% were positive for influenza with the majority caused by influenza A(H1N1) pdm09. Almost two-thirds (62%) of the ILI-influenza positive cases and 46% SARI-influenza positive cases aged less than five years. Also, over 50 years old patient was reported to have the second-highest proportion of SARI associated influenza (30%). Conclusion The findings indicate that the seasonal influenza virus results in considerable hospital visits, admissions, and deaths in Afghanistan. The data from this study will inform and guide policymakers in developing national influenza vaccination policies.

scholarly journals Contemporary Seasonal Influenza A (H1N1) Virus Infection Primes for a More Robust Response To Split Inactivated Pandemic Influenza A (H1N1) Virus Vaccination in Ferrets

2010 ◽  
Vol 17 (12) ◽  
pp. 1998-2006 ◽  
Author(s):  
Ali H. Ellebedy ◽  
Thomas P. Fabrizio ◽  
Ghazi Kayali ◽  
Thomas H. Oguin ◽  
Scott A. Brown ◽  
...  
Keyword(s):  
Influenza Virus ◽  
Pandemic Influenza ◽  
Influenza A ◽  
Seasonal Influenza ◽  
H1n1 Virus ◽  
H1n1 Influenza ◽  
Influenza Viruses ◽  
Inactivated Vaccine ◽  
H1n1 Influenza Virus ◽  
Influenza A H1n1

ABSTRACT Human influenza pandemics occur when influenza viruses to which the population has little or no immunity emerge and acquire the ability to achieve human-to-human transmission. In April 2009, cases of a novel H1N1 influenza virus in children in the southwestern United States were reported. It was retrospectively shown that these cases represented the spread of this virus from an ongoing outbreak in Mexico. The emergence of the pandemic led to a number of national vaccination programs. Surprisingly, early human clinical trial data have shown that a single dose of nonadjuvanted pandemic influenza A (H1N1) 2009 monovalent inactivated vaccine (pMIV) has led to a seroprotective response in a majority of individuals, despite earlier studies showing a lack of cross-reactivity between seasonal and pandemic H1N1 viruses. Here we show that previous exposure to a contemporary seasonal H1N1 influenza virus and to a lesser degree a seasonal influenza virus trivalent inactivated vaccine is able to prime for a higher antibody response after a subsequent dose of pMIV in ferrets. The more protective response was partially dependent on the presence of CD8+ cells. Two doses of pMIV were also able to induce a detectable antibody response that provided protection from subsequent challenge. These data show that previous infection with seasonal H1N1 influenza viruses likely explains the requirement for only a single dose of pMIV in adults and that vaccination campaigns with the current pandemic influenza vaccines should reduce viral burden and disease severity in humans.

scholarly journals Response to 2009 Pandemic Influenza A (H1N1) Vaccine in HIV-Infected Patients and the Influence of Prior Seasonal Influenza Vaccination

PLoS ONE ◽  
2011 ◽  
Vol 6 (1) ◽  
pp. e16496 ◽  
Author(s):  
Darius Soonawala ◽  
Guus F. Rimmelzwaan ◽  
Luc B. S. Gelinck ◽  
Leo G. Visser ◽  
Frank P. Kroon
Keyword(s):  
Influenza Vaccination ◽  
Pandemic Influenza ◽  
Influenza A ◽  
Seasonal Influenza ◽  
H1n1 Vaccine ◽  
Seasonal Influenza Vaccination ◽  
Influenza A H1n1

scholarly journals The Emergence of Oseltamivir-Resistant Seasonal Influenza A (H1N1) Virus in Korea During the 2008–2009 Season

2011 ◽  
Vol 2 (3) ◽  
pp. 178-185 ◽  
Author(s):  
Woo-Young Choi ◽  
Inseok Yang ◽  
Sujin Kim ◽  
Namjoo Lee ◽  
Meehwa Kwon ◽  
...  
Keyword(s):  
Influenza A ◽  
Seasonal Influenza ◽  
H1n1 Virus ◽  
Influenza A H1n1

scholarly journals Complications and Outcomes of Pandemic 2009 Influenza A (H1N1) Virus Infection in Hospitalized Adults: How Do They Differ From Those in Seasonal Influenza?

2011 ◽  
Vol 203 (12) ◽  
pp. 1739-1747 ◽  
Author(s):  
N. Lee ◽  
P. K. S. Chan ◽  
G. C. Y. Lui ◽  
B. C. K. Wong ◽  
W. W. Y. Sin ◽  
...  
Keyword(s):  
Virus Infection ◽  
Influenza A ◽  
Seasonal Influenza ◽  
H1n1 Virus ◽  
Influenza A H1n1 ◽  
H1n1 Virus Infection

scholarly journals Influenza A (H1N1) 2009 monovalent and seasonal influenza vaccination among adults 25 to 64 years of age with high-risk conditions—United States, 2010

2013 ◽  
Vol 41 (8) ◽  
pp. 702-709 ◽  
Author(s):  
Peng-jun Lu ◽  
Amparo Gonzalez-Feliciano ◽  
Helen Ding ◽  
Leah N. Bryan ◽  
David Yankey ◽  
...  
Keyword(s):  
United States ◽  
High Risk ◽  
Influenza Vaccination ◽  
Influenza A ◽  
Seasonal Influenza ◽  
Seasonal Influenza Vaccination ◽  
Influenza A H1n1
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