American citizens and permanent residents who want to come to Canada for non-essential reasons can do so. But with the Delta variant surging in the U.S., and with Canada on the cusp of a fourth wave driven by the variant, experts say children under 12 are particularly vulnerable.“People have to be really careful about this because Delta is kind of changing the way risk presents itself,” said Dr.
Omar Khan, professor of biomedical engineering at the University of Toronto.“The timing is also tricky too because we’re looking for a September opening date for schools, and with extra travel, these things may not mix well.”No vaccine has been approved for children under 12, but several clinical trials are underway.