What’s behind Canada’s blood shortage? Officials ‘perplexed’  CTV NewsCanadian Blood Services calling for donors amid serious drop in supply  CHEK NewsCanadian Blood Services plea for donations as supply drops 20% — below typical summer slump  Global NewsBlood donors urgently needed across the country as supply drops 20 per cent  ntv.ca‘Physicians are making a call on who’s going to get care’: Why Canada’s blood supply is running low  Inside Halton