<p>Background : The connection between sentences must be clear</p><p>Methods : Informations missings are the study type, where, data analysis and indicators analyzed. It's better to make a simple sentence per idea</p><p>Results : in the begining, you must first present how many cases you have recruted. Your methods are long, while your results are too short</p><p>Conclusion : you must talk "vaccine riposte" somewhere in previous parts if you want to include it in the conclusion.</p><p>&nbsp;</p>