Categories #canadahealth #canadahealthy #canadalistings #canadastory #canadianhealth Health Search Canada Online Listing Single dose of Johnson & Johnson vaccine is 66% effective, say U.S. regulators Post author By Search Canada Online Listing Blog Post date February 24, 2021 Johnson & Johnson’s one-shot COVID-19 vaccine appeared safe and effective in trials, U.S. Food and Drug Administration staff said in documents published on Wednesday, paving the way for its approval for emergency use. Related ← Alberta’s system overwhelmed on first day that all those 75 and older can book COVID-19 vaccinations → Head of Ontario’s COVID-19 vaccine task force provides update on rollout