Article content Canada’s COVID face is changing — for reasons that still aren’t entirely clear. COVID wards are filling with young and middle-aged adults. Nearly as many under-50s died from COVID-19 in Ontario intensive care units in the first 48 days of this now cresting third wave as in the entire September to February wave. Harrowing numbers of pregnant women are landing in intensive care. By mid-April, half of those in Mount Sinai Hospital’s ICU were pregnant or had recently given birth. At the Toronto General Hospital on Wednesday, a record 28 people were connected to artificial lungs “and still younger than the first two waves,” reported Dr. Eddy Fan, medical director of the Extracorporeal Life Support Program at Toronto’s University Health Network. Other doctors are reporting multiple people born in the 1990s.