(Halifax) The Canadian government is allocating nearly $4.8 million for a new national study that will examine the effects of combining approved COVID-19 vaccines in adults.
Researchers will look at the safety and effectiveness of using two different COVID-19 vaccines for the first and second doses.
The project will also study the effects of increasing the interval between doses.
the dagain Joan Langley, professor at Dalhousie University in Nova Scotia and co-principal investigator of this research project, aimed to determine the effects of different vaccine administration intervals on immunity and protection, where questions are raised about the interchangeability of vaccines.
Researchers will also try to find out what happens when two doses of different COVID-19 vaccine products are used and how long this reaction lasts.
The study, titled “Mixing the Second Dose of COVID-19 Vaccine for Safety and Immunogenicity” (MOSAIC), aims to recruit 1300 participants in Nova Scotia, Quebec, Ontario, Manitoba in Alberta and British Columbia as soon as possible.
Four COVID-19 vaccines are currently approved for use in Canada, three of which are distributed by public health programs: Pfizer-BioNTech, Moderna and Oxford-AstraZeneca. As more vaccines become available, they will be added to studies to fill knowledge gaps in public health.
The research team says the results of their work will be shared regularly with public health officials to help make decisions for the continued deployment of vaccines in Canada.