Dr. Christos Karatzios, a pediatric infectious diseases doctor at Montreal Children's Hospital, said if one thing is clear during COVID-19, it is that the vaccines are working and people are vulnerable until they get both doses of any two vaccines.
"Mixing and matching, who cares," he said. "Just get two vaccines into people."
These experts are real sticklers for sticking to the scientific method.
These experts are real sticklers for sticking to the scientific method.