Weather variability and seasonal influenza among different age groups in Queensland, Australia: A Bayesian spatiotemporal analysis

2016 ◽  
Vol 2016 (1) ◽  
Author(s):  
Wenbiao Hu* ◽  
Xiadodong Huang
Keyword(s):  
Seasonal Influenza ◽  
Age Groups ◽  
Spatiotemporal Analysis ◽  
Weather Variability

scholarly journals H1N1 INFLUENZA VERSUS SEASONAL INFLUENZA MORBIDITY AND MORTALITY: A PROSPECTIVE STUDY IN AL-KINDY TEACHING HOSPITAL/ IRAQ-BAGHDAD

2016 ◽  
Vol 12 (2) ◽  
pp. 18-21
Author(s):  
Ismail A. Hussain AL-Ameri ◽  
Baker Fadel ◽  
Ali Sajid ◽  
Imad Kareem
Keyword(s):  
Teaching Hospital ◽  
Seasonal Influenza ◽  
Influenza Pandemic ◽  
Age Groups ◽  
H1n1 Influenza ◽  
Influenza Viruses ◽  
Morbidity And Mortality ◽  
Severe Illness ◽  
Wide Range ◽  
Symptoms And Signs

Background: H1N1 influenza pandemic or swine flu was an influenza pandemic first described in Iraq in October 2009 .The virus appeared to be anew strain of H1N1 causes wide range of morbidity and mortality among different genders and age groups as part of worldwide pandemics.Seasonal flu is a contagious respiratory illness caused by influenza viruses that infect the nose, throat, and lungs. It can cause mild to severe illness, and at times can lead to death. The best way to prevent the flu is by getting a flu vaccine each year. Objectives: Is to determine the morbidity and mortality in different age groups in patients with H1N1 influenza versus those patients with seasonal influenza who were admitted at the same time to AL-kindy teaching hospital during pandemic 2009. Type of the study: A retrospective observational study. Methods: A total number of 210 cases with influenza symptoms and signs were included in this study which was conducted at AL-kindy teaching hospital , Baghdad, Iraq at inpatient medical wards over a period from October to December 2009. All cases were tested by real time PCR for H1N1 influenza virus by taking nasal and throat swab in addition to monitoring symptoms and signs of influenza and chest radiographs. Results: Out of 210 cases, 90 (42.85%) cases were positive for H1N1 influenza and 120 (57.14%) cases had negative test are considered having seasonal influenza. Of the positive cases(64.44%) were males and (35.55%) were females. Of negative cases(seasonal flu)male gender were (61.66%) , while female gender were (38.33%). 57.77% of positive cases developed flue like illness compared with 54.16% of negative while 25.55% of positive developed pneumonia compared with 22.5% of negative.5.55% of positive cases developed ARDS compared with 5% only in negative cases.11.11% had different presentation in positive cases (bronchitis ,gastroenteritis) while 18.33%of negative. Mortality in positive cases are 14.4% compared with only 10% in negative cases. Conclusions: Influenza A/H1N1had same symptoms and signs of epidemic seasonal influenza but run aggressive and short course of morbidity in 3-5 days with high percentage of complication and high mortality compared with seasonal epidemic influenza with rare affection above 65 years old, both groups had same incidence of complication with pneumonia and ARDS

scholarly journals The average peak time and intensity of seasonal influenza may vary by age: a study of laboratory confirmed influenza

2020 ◽  
Vol 21 (5) ◽  
pp. 170-176
Author(s):  
Bhikhari P Tharu
Keyword(s):  
Seasonal Influenza ◽  
Human Life ◽  
Parametric Method ◽  
Age Groups ◽  
Respiratory Illness ◽  
Peak Time ◽  
Age Group ◽  
Calendar Time ◽  
Control And Prevention ◽  
The Usa

Background: Seasonal influenza (SI) is an acute respiratory illness that exerts a severe impact on human life year-round. Yet, very few studies have been conducted to investigate its peak timing for different age groups. Objective: To evaluate the average peak calendar time and intensity for the incidence of SI for different age groups. Methods: The study uses laboratory-confirmed Influenza data from the Centers for Disease Control and Prevention (CDC) of the USA with age groups 2, 11, 34, 57 and 65 years during 2009–2018 for the analysis. A non-parametric method of estimation of a circular probability distribution called likelihood cross-validation method has been utilised. Results: The average peak date of incidence for age groups 2 and 11 is around the last week of December. However, the date shifts to the last week of January to the first week of February for other groups. Age groups 65 and 2 years experienced the most severe impact among all. Discussion: The average peak time for SI incidence is between the last week of December to January with a single peak time for every age group. However, the incidence seems to develop an additional moderate peak time for age group 65.

scholarly journals Residual immunity in older people against the influenza A(H1N1) – recent experience in northern Spain

2009 ◽  
Vol 14 (39) ◽  
Author(s):  
E Pérez-Trallero ◽  
L Piñeiro ◽  
D Vicente ◽  
M Montes ◽  
G Cilla
Keyword(s):  
Pandemic Influenza ◽  
Influenza A ◽  
Seasonal Influenza ◽  
H1n1 Virus ◽  
Influenza Pandemic ◽  
Age Groups ◽  
H3n2 Virus ◽  
Recent Experience ◽  
Northern Spain ◽  
Influenza A H1n1

The 2009 pandemic influenza A(H1N1) virus has a higher incidence in children and young adults, a pattern that has also been reported in seasonal influenza caused by the influenza A(H1N1) virus. We analysed age at infection in symptomatic patients with influenza in the Basque Country (northern Spain), reported through the sentinel influenza surveillance system which monitors 2.2-2.5% of the population. Between September 1999 and August 2009, influenza A(H3N2) or seasonal influenza A(H1N1) was detected in 941 patients, and from April to August 2009, pandemic influenza A(H1N1) was detected in 112 patients. The H3/H1 seasonal influenza ratio was between 3.3 and 3.4 in the under 60 year-olds, but 9.8 in older individuals, suggesting that people born before 1950 have residual immunity against the influenza A H1N1 subtype (both seasonal and pandemic). Introduction In 1957, the Asian influenza pandemic was caused by influenza A(H2N2) virus, which circulated until 1968 when it was displaced by the influenza A(H3N2) virus which was responsible for the Hong Kong pandemic. Before 1957, direct descendants of the influenza A(H1N1) virus that had caused the 1918 pandemic (Spanish flu) had circulated. In 1977, an influenza A(H1N1) strain re-emerged, which, together with the dominant influenza A(H3N2) strain, has been the cause of seasonal human influenza for more than three decades [1]. Despite the prolonged co-circulation of both subtypes, few studies have analysed their ability to affect distinct age groups. The current pandemic influenza A(H1N1) virus, influenza A(H1N1)v, which emerged in the spring of 2009, has spread throughout the world. The aim of this study was to compare the distribution in distinct age groups of infections caused by the two subtypes of seasonal influenza in the past 10 seasons and refer therelate this to recent infections due to influenza A(H1N1)v.

scholarly journals Spotlight influenza: Influenza surveillance before and after the introduction of point-of-care testing in Denmark, season 2014/15 to 2018/19

2021 ◽  
Vol 26 (37) ◽  
Author(s):  
Guido Benedetti ◽  
Tyra Grove Krause ◽  
Uffe Vest Schneider ◽  
Jan Gorm Lisby ◽  
Marianne Voldstedlund ◽  
...  
Keyword(s):  
Seasonal Influenza ◽  
Point Of Care ◽  
Relative Proportion ◽  
Age Groups ◽  
Population Based ◽  
Influenza Surveillance ◽  
Routine Surveillance ◽  
Before And After ◽  
Data Capturing ◽  
Analytical Time

Background In Denmark, influenza surveillance is ensured by data capturing from existing population-based registers. Since 2017, point-of-care (POC) testing has been implemented outside the regional clinical microbiology departments (CMD). Aim We aimed to assess influenza laboratory results in view of the introduction of POC testing. Methods We retrospectively observed routine surveillance data on national influenza tests before and after the introduction of POC testing as available in the Danish Microbiological Database. Also, we conducted a questionnaire study among Danish CMD about influenza diagnostics. Results Between the seasons 2014/15 and 2018/19, 199,744 influenza tests were performed in Denmark of which 44,161 were positive (22%). After the introduction of POC testing, the overall percentage of positive influenza tests per season did not decrease. The seasonal influenza test incidence was higher in all observed age groups. The number of operating testing platforms placed outside a CMD and with an instrument analytical time ≤ 3 h increased after 2017. Regionally, the number of tests registered as POC in the Danish Microbiological Database and the number of tests performed with an instrument analytical time ≤ 3 h or outside a CMD partially differed. Where comparable (71% of tests), the relative proportion of POC tests out of all tests increased from season 2017/18 to 2018/19. In both seasons, the percentage of positive POC tests resulted slightly lower than for non-POC tests. Conclusion POC testing integrated seamlessly into national influenza surveillance. We propose the use of POC results in the routine surveillance of seasonal influenza.

scholarly journals A Campaign to Improve Seasonal Influenza Immunization Compliance in a University Nursing Health and Wellness Clinic: A Case Study

2020 ◽  
pp. 7-9
Author(s):  
Helen Reyes ◽  
Collette Loftin ◽  
Vicki Hartin ◽  
Teresa Smoot ◽  
J Dirk Nelson ◽  
...  
Keyword(s):  
Seasonal Influenza ◽  
Age Groups ◽  
Community Response ◽  
Health And Wellness ◽  
Influenza Immunization ◽  
Healthy People 2020 ◽  
Seasonal Flu ◽  
Flu Vaccine ◽  
The University ◽  
Nursing Health

Seasonal influenza can result in enormous physical and economic burdens. Healthy People 2020 report that substantially fewer than the recommended 70% in most age groups actually receive the immunization (Bekkat-Berkani & Romano-Massotti, 2018). The purpose of this study was to ascertain whether the WTAMU Nursing Health and Wellness Clinic seasonal flu campaign was considered effective and advantageous to those who received it on campus. A brief survey was developed for distribution to those who received the influenza immunization during the 2018-2019 flu seasons. Making the flu vaccine convenient and inexpensive/free has been an effective mechanism to improve immunization acceptance in our community. Response rate for the survey was 61% or 106 individuals with 44%, reporting that they would not have sought out the seasonal flu immunization had it not been made available on the university campus. More importantly, when the 106 participants were asked where on campus they received their immunization, only 41% physically came to the nursing clinic, while 59% were provided the vaccine in their office or departmental workplace. Of those individuals receiving immunization in their office or workplace, 38% reported that had it not been provided in this setting, they would not have gone to the nursing clinic or elsewhere to be immunized. Of those responding to the survey, 61% reported having received an influenza immunization during the 2017-2018 seasons. The remaining 39% of respondents either could not recall or denied receiving the vaccine. However, when asked about their intentions to be immunized in the 2019-2020 season, 90% of the participants related positive intention to receive the seasonal flu immunization.

scholarly journals Community pharmacist-administered seasonal influenza vaccination: a national customer survey

2020 ◽  
Vol 13 (1) ◽  
Author(s):  
Dominik Stämpfli ◽  
Adrian Martinez-De la Torre ◽  
Sophie Du Pasquier ◽  
Danielle Stegmann ◽  
Andrea Brügger ◽  
...  
Keyword(s):  
High Risk ◽  
Influenza Vaccination ◽  
Community Pharmacist ◽  
Seasonal Influenza ◽  
Age Groups ◽  
Risk Groups ◽  
Injection Technique ◽  
Equal Distribution ◽  
Seasonal Influenza Vaccination ◽  
Influenza Vaccinations

Abstract Background In Switzerland, the influenza vaccination is recommended for high-risk groups and people who have contact with high-risk groups. Since 2015, Swiss pharmacists are allowed to vaccinate healthy adults after acquiring a certificate of competence for vaccination and blood sampling techniques. We aimed to assess customers of the seasonal influenza vaccination in pharmacies in regard to their satisfaction, motivation, and reasons. Methods Swiss pharmacies collected survey data during a period of 12 weeks from mid-October 2019 to mid-January 2020. Each participating pharmacy was sent 20 questionnaires to be handed out to vaccinated customers. The questionnaire was available in German and French and subdivided into four sections: demographic information, satisfaction, reasons for getting the vaccination, and reasons for choosing a pharmacy as a place of vaccination. We tested for statistical differences in answer tendencies across strata on questionnaire language, age groups, and levels of education. Results Of the 1600 surveys sent, 80 pharmacies sent back 656 completed questionnaires (return rate, 41%). Main age bracket was 65–74 years (26.2%), followed by 55–64 years (24.7%), with an equal distribution of reported sex (female, 49.5%). Of the respondents, 99% would have recommended the service and 88.5% felt very comfortable being vaccinated by a pharmacist. Satisfaction included injection technique, used facilities, preparatory discussions, and pricing of the service. Easy scheduling was a main motivation for choosing a pharmacy as the vaccination provider. We identified minor differences in answer tendencies across questionnaire language and age groups, but not across levels of education. Conclusion Customer satisfaction with community pharmacist-administered seasonal influenza vaccinations is high in Switzerland.

scholarly journals Heterotypic Neuraminidase Antibodies Against Different A(H1N1) Strains are Elicited after Seasonal Influenza Vaccination

Vaccines ◽  
2019 ◽  
Vol 7 (1) ◽  
pp. 30 ◽  
Author(s):  
Jose Mendez-Legaza ◽  
Raúl Ortiz de Lejarazu ◽  
Ivan Sanz
Keyword(s):  
Immune Response ◽  
Influenza Vaccination ◽  
Seasonal Influenza ◽  
Geometric Mean ◽  
Age Groups ◽  
Influenza Vaccines ◽  
Serum Samples ◽  
Seasonal Influenza Vaccination ◽  
Before And After ◽  
Original Antigenic Sin

Neuraminidase (NA) content is not standardized in current seasonal influenza vaccines; neither anti-NA antibodies (anti-NA Abs) are measured nor is it well-defined as a correlate of humoral protection. In this work, the presence of NA1 antibodies against classical A(H1N1) and A(H1N1) pdm09 subtypes was studied before and after vaccination with seasonal vaccines containing A/California/07/2009 strain (A(H1N1) pdm09 subtype). By Enzyme-Linked Lectin Assay (ELLA; Consortium for the Standardization of Influenza Seroepidemiology), we analyzed serum samples from two different cohorts (adults and elderly). The presence of anti-NA Abs at titers ≥1/40 against classical A(H1N1) and A(H1N1) pdm09 subtypes were frequently found in both age groups, in 81.3% and 96.3% of adults and elderly, respectively. The higher titers of anti-NA Abs (NAI titers) were detected more frequently against classical A(H1N1) strains according to the expected age when the first flu infection takes place. In this way, an Original Antigenic Sin phenomenon related to NA seems to be part of the immune response against flu. Seasonal-vaccination induced homologous seroconversion against NA of A(H1N1) pdm09 subtype in 52.5% and 55.0%, and increased the Geometric Mean Titers (GMTs) in 70.0% and 78.8% of adults and elderly, respectively. Seasonal vaccination also induced a heterotypic anti-NA Abs response against classical A(H1N1) strains (seroconversion at least in 8.8% and 11.3% of adults and elderly, respectively, and an increase in GMTs of at least 28.0% in both age groups). These anti-NA Abs responses occur even though the seasonal vaccine does not contain a standardized amount of NA. This work demonstrates that seasonal vaccines containing the A(H1N1) pdm09 subtype induce a broad antibody response against NA1, that may be a target for future influenza vaccines. Our study is one of the first to analyze the presence of Abs against NA and the response mediated by NAI titers after seasonal influenza vaccination.

scholarly journals Flu vaccination among health workers in Italy: results from the nationwide surveillance PASSI 2015-18

2020 ◽  
Vol 30 (Supplement_5) ◽  
Author(s):  
R Gallo ◽  
V Minardi ◽  
B Contoli ◽  
V Possenti ◽  
G Carrozzi ◽  
...  
Keyword(s):  
Influenza Vaccination ◽  
Seasonal Influenza ◽  
Health Workers ◽  
Vaccination Campaign ◽  
Population Sample ◽  
Age Groups ◽  
Risk Category ◽  
Respiratory Pathogens ◽  
Italian Population ◽  
Flu Vaccination

Abstract Background Influenza causes a significant health and socio-economic burden every year. Healthcare workers (HCWs) are at higher risk of exposure to respiratory pathogens than general population, including seasonal influenza virus, with potential threats to their health and patients' safety. We aimed to estimate the adherence to flu vaccination of health workers in 2015-2018 seasons in Italy. Methods We analyzed data collected between 2015 and 2018 from the Italian Behavioral Risk Factor Surveillance System (PASSI). PASSI collects data on health behaviors in the adults (18-64 years) through telephonic administration of standardized questionnaires to a representative sample of Italian population. The answers related to flu vaccination refer to the vaccination campaign preceding the interview Results Preliminary data show that overall 11.9% (CI 10.3% - 13.7%) of HCWs reported to have been vaccinated vs 7.2% (CI 6.9% - 7.5%) of the total population sample. Physicians showed a higher overall adherence compared to other healthcare professionals (22.4% [CI 18% - 27.5%] vs 9% [CI 7.4% - 10.9%], respectively). Differences of adherence were found also across age groups: 18.3% [CI 15% - 22.2%] of respondents between 50-64 years reported to have received a vaccination compared to 10% (CI 7.9% - 12.5%) and 4.3% (CI 2.8% - 6.4%) of 35-49 years and 18-34 years age groups, respectively. The annual influenza vaccination coverage for people working in healthcare has increased over the years (9.8% in 2015 vs 14.1% in 2018). Conclusions Although coverage rates are increasing over time, adherence to influenza vaccination is still too low, especially among younger HCWs and non-medical HCWs. Strategic actions, such as local and national programs to increase self-awareness of being an at-high-risk category for contracting and transmitting infections and/or mandatory vaccination, should be adopted to sharply achieve an optimal coverage rate for HCWs. Key messages Adherence to seasonal influenza vaccination is still very low among Italian HCWs. A participatory attitude towards vaccination for HCWs should be pursued. Monitoring and reporting process should be improved to provide further detailed evidence for adopting targeted programs.

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