Can I receive my second vaccine dose from a different product (e.g. first dose is the Moderna vaccine and second dose is the Pfizer-BioNTech vaccine)?

Both doses of your vaccine series should be completed with the same product. The COVID-19 vaccines are not interchangeable with each other and the safety and efficacy of a mixed-product series has not been evaluated. A different product may only be used in certain cases, such as when the first-dose vaccine product cannot be determined or is no longer available.