Omicron is spreading rapidly in Canada. Barely two weeks after the first cases of the coronavirus variant were identified in Ontario, it became the dominant strain in the province, and experts say that will soon be the case across the country. Even as Canada is reporting some of the highest daily case counts seen throughout the whole pandemic, some doctors say the real numbers could be several times higher because of the difficulties many people face in accessing tests. Today, Dr. Zain Chagla, an infectious diseases physician at St. Joseph’s Healthcare in Hamilton, explains the latest research on Omicron from around the world — and how that research can help inform your choices around holiday gatherings.