IAS® Influenza vaccination: monitor the seasonal influenza vaccination campaign in real time

A public health challenge

In France an influenza vaccination campaign is carried out between the months of October and January. The social security invites the persons targeted by the recommendations of the Public Health Council to be vaccinated by sending them a printed voucher allowing them to have this done free of charge. The people covered are especially the over 65s, persons suffering from certain long term diseases, persons suffering from asthma or from chronic obstructive pulmonary disease (COPD) (1). The doctors also have a voucher available allowing them to prescribe the vaccine to those at risk who have not received a vaccination voucher (persons suffering from obesity, pregnant women). During the vaccination campaign period the vaccine is completely free of charge for all populations at risk who have a vaccination voucher. The French Public Health Act has set a vaccination target for the population at risk of 75%. This target is not reached in France. Vaccination coverage has even been in decline since 2009. For example, only 57% of the French population of over 65s were vaccinated in 2013-2014 (Continental France, estimate)

The IAS objective®

The IAS® objective is to give an accurate and reliable vaccination rate estimate in real time and to publish this data to the general public, health care professionals and public health administrators as Open Data. Real time data availability makes it possible to react when there is still time to do so.

The IAS Method®

The IAS® estimates the vaccination coverage rate for the biggest risk group: the 65s and over. For this age group and for a given campaign, influenza vaccine purchases starting from September and correlated to the population on the preceding 1st January (INSEE data). The vaccine sales data comes from 3004 dispensing chemists representative of the French pharmacy network (Celtipharm network). [3]. The data is then extrapolated to continental France. The data is sent anonymously and automatically and published on D+1.

This data is available from 2008 onwards. In order to validate the methodology, this has made it possible to calculate the vaccination rates for the last 5 campaigns and to compare them to those estimated by the CNAMTS (2) (French national health). The correlation coefficient between the and CNAMTS estimates is 98.9% for the over 65s for the 2009/2010 to 2012/2013 campaigns. This excellent correlation therefore validates the IAS methodology. The rates estimated by are on average 2.5% higher than those estimated by the CNAM. This is due to the fact that OpenHealth takes into account purchases that are not refunded by social security. Furthermore, the scopes of the study are different: data is for purchases in town pharmacies, whereas the data from the CNAM only covers general social security refunds excluding Local private health insurance.

Using the interactive chart

The vaccination coverage for the over 65s for the current campaign is shown on an interactive graph which is updated daily. This makes it possible for you to compare vaccination progress relative to the 5 previous seasons and to focus on a specific period.

1-    The 2014 vaccination calendar and recommendations of the French Public Health Council.

2-    Seasonal influenza vaccination campaign: A public health priority Press kit - 9th October 2013.