Why was h1n1 declared a pandemic

WHO declared an end to the pandemic on Aug. Featured Whitepapers. Featured Webinars. Where are the 18 Leapfrog 'F' hospitals? The Becker's Hospital Review website uses cookies to display relevant ads and to enhance your browsing experience. By continuing to use our site, you acknowledge that you have read, that you understand, and that you accept our Cookie Policy and our Privacy Policy. Jun 11, Share this page:. Sign up now». Related News All news. Jul 21 Drug-resistant pneumonia tied to deaths in Bangladeshi kids.

Mar 19 Mar 12 Randomized trial supports shorter antibiotic course for kids' pneumonia. Dec 16 COVID 5 times deadlier than flu for hospital patients, study finds. Newsletter Signup. Lower respiratory tract infections are a leading cause of deaths in developing countries and are also the third leading cause of death worldwide.

Globally influenza is responsible for , to , deaths annually 1. Subsequently, the infection led to spread of disease across 74 countries with 30, confirmed cases on June 11, This prompted the World Health Organization to raise the warning from phase 5 to phase 6 3. A total of countries were affected by the pandemic worldwide. The World Health Organization declared the post pandemic phase on August 10, 5.

Subsequently, the influenza activity in the six regions of the world has declined 6. The Central and State governments in India had taken the pandemic very seriously and made several unprecedented and innovative interventions including the pandemic preparedness plan 7.

This study was a retrospective analysis of the clinical epidemiological information consisting of clinical presentations, history of contact among H1N1 positive persons and positivity rate of different types of influenza viruses in these samples. Throat and nasal swabs were collected during May - September from 11 designated government hospitals in Delhi and many different States of the country and tested for influenza A H1N1.

Although all patients included in the study were categorized as category C, but none of the patients complained of somnolence, inability to feed well, convulsions, or worsening of underlying chronic conditions during admission. These samples were processed in Bio Safety level 3 BSL 3 laboratory within h of receipt of sample. A sample was declared positive when it showed amplification in all 4 target genes. A total of 33, persons were tested for H1N1, of whom 7, Seasonal influenza exhibited surge in August and August Fig.

Maximum number of influenza A H1N1 positives cases seen in the age group of yr, followed by yr Fig. Monthly trend of pandemic influenza A H1N1 and seasonal flu reported from May to September Age and sex distribution of the influenza A H1N1 positive cases. Males were affected more than females. A total of Majority of the positive cases of pandemic influenza A H1N1 virus presented with acute and self-limited infection, with the highest attack rates reported among children and young adults.

Similar study from Vietnam showed difference in the positivity rate of influenza A H1N1 with total positivity of 2. Another study from England suggested the total positivity to be 7 per cent Our study had samples mainly belonging to category C. The differences could be attributed to the categorization of cases. Our results on seasonality were in variance with the report from Vietnam and England 9 , These studies reported two peaks for both influenza A H1N1 and influenza A seasonal flu , one in summer and another one in winter.

These differences could probably be due to change in the geographical and climatic conditions.