Canada's National Advisory Committee on Immunization's revised guidelines, the new guidance calls for the Pfizer-BioNTech offering due to "Lower reported cases of myocarditis/pericarditis ... compared to Moderna Spikevax."
What myocarditis/pericarditis? This is a conspiracy theory. The vaccines are safe, bigots. Take your poison and shut up.
Misinformation. Nothing is banned. I recommend reading the document: https://www.canada.ca/content/dam/phac-aspc/documents/services/immunization/national-advisory-committee-on-immunization-naci/rapid-response-recommendation-use-covid-19-vaccines-individuals-aged-12-years-older-myocarditis-pericarditis-reported-following-mrna-vaccines/summary.pdf
It says, in part:
"After reviewing the latest evidence, NACI continues to:
Strongly recommend the preferential use of a complete series of an mRNA COVID-19 vaccine over the use of viral vector COVID-19 vaccines in all authorized age groups.
Based on new evidence, and in order to further minimize the rare risk of adolescents and young adults experiencing myocarditis and/or pericarditis after receiving a COVID-19 mRNA vaccine, NACI now recommends: Pfizer-BioNTech Comirnaty mRNA vaccine (30 mcg) is preferred in adolescents and young adults 12 to 29 years of age."
In other words use Pfizer if you have it but Moderna will do if you don't.