By Anna Mehler Paperny TORONTO (Reuters) – Health authorities across Canada have cut the hours of hospital emergency departments and urgent care clinics in recent weeks, a move that in some cases may extend through the summer, due to a surge in patients and staff shortages. The situation, clinicians say, is tied to a resurgence of viral infections such as COVID-19 among adults and children and a push by others to seek care delayed by the pandemic, and exacerbated by the high number of healthcare workers who are sick or burned out. The strain has led to scenes of clogged hospital hallways and o…