Recently, various strategies have been recommended in a number of jurisdictions regarding the time interval between the two doses of COVID-19 vaccines. The Ministère de la Santé et des Services sociaux (MSSS) has asked the Comité sur l'immunisation du Québec (CIQ) to explain the basis of these different intervals. The MSSS also inquired whether the CIQ has maintained the recommendations that it put forward in a recent scientific notice (1), in particular, the recommendation to offer an initial dose of the vaccine to the greatest number of individuals belonging to the first six priority groups1 before administering the second dose.
Data on certain approved vaccines
The Phase 3 trials on COVID-19...