OTTAWA—Experts who advocate for improvements to long-term care in Canada say the provinces need to move faster to vaccinate residents and the people who look after them. Canada’s overall vaccination rollout is being questioned with more than 420,000 doses now received, but only about one-quarter of those injected. And long-term-care residents, who have paid the heaviest price for the pandemic and were to be at the front of the line, have had to wait in most provinces because the first vaccine from Pfizer and BioNTech was deemed too fragile to distribute outside major hospitals, at least at first. “It’s another tragedy,” said Doris Grinspun, CEO of the Registered Nurses Association of Ontario. “The reality is all the excuses used for not doing them first are just that, excuses.” Quebec is the only province that selected two long-term-care homes as the first sites to receive and inject the Pfizer-BioNTech vaccine. All …