(Katharine Lang/ Medical News Today) — A Canadian study has found a link between the new variants of SARS-CoV-2, particularly the Delta variant, and an increased risk of severe disease and death.

The retrospective study, by the University of Toronto and appearing in the Canadian Medical Association Journal  …

(Adam Miller/ CBC News) — Canadians are entering one of the most confusing chapters of the pandemic — and many may be left wondering why we’re not where we’d hoped to be after becoming one of the most vaccinated countries in the world.

Reports of waning immunity from COVID-19 vaccines, the potential  …

(Leslie Young/ Global News) — The fourth wave of COVID-19 that public health experts have been warning about for months has arrived.

“The latest national surveillance data indicate that a fourth wave is underway in Canada and that cases are plotting along a strong resurgence trajectory,” said Dr. Theresa Tam, Canada’s  …

(Thompson Reuters/ CBC News) — The war against COVID-19 has changed because of the highly contagious delta variant, the U.S. Centers for Disease Control (CDC) said, proposing a clearer message, mandatory vaccines for health workers and a return to universal masking.

An internal CDC document said the variant, first  …