“…Several studies have been conducted to identify the risk factors for developing a severe form of COVID-19 among vaccinated populations. 14 , 15 , 27 , 28 , 29 From a US database of 465 facilities, 14 among 1.2 million people vaccinated between December 2020 and October 2021, 2,246 developed COVID-19, of whom 327 were hospitalised and 31 died. The authors found an increased risk of a severe form of COVID-19 among immunocompromised vaccinated individuals, those aged 65 and over, and those presenting certain comorbidities, such as lung and liver diseases, chronic renal failure, diabetes, cardiovascular diseases, or neurological diseases.…”