When more than one vaccine is available at the same clinic it is essential to ensure that people receive the correct vaccine which is correctly prepared. Currently different COVID-19 vaccines are not to be used interchangeably and preparation differs (e.g. the COMIRNATY™ vaccine requires dilution).
In order to address the risk that people are inadvertently administered the incorrect vaccine, incorrect dose or incorrect dosing interval, or incorrectly prepared product strict workflows and processes for separating the vaccines need to be maintained. Separation can be physical (different areas for preparation and drawing up or administration)
or time-based (e.g. a morning clinic provides one vaccine and an afternoon clinic provides another).