With a new wave of COVID-19 infections fueled by the Delta variant striking countries worldwide, disease experts are scrambling to learn whether the latest version of coronavirus is making people - mainly the unvaccinated - sicker than before. 11

The rate of COVID-19 vaccinations in the United States continues to rise, a positive sign amid skyrocketing cases and hospitalizations after weeks of lagging inoculations. 19

According to the WHO, some 85 per cent of vaccines have been administered by rich countries. In contrast, 85 per cent of the world's 26 million refugees live in developing countries struggling to vaccinate even the most vulnerable. 11

A new study has found differences in which COVID-19 symptoms are experienced shortly after infection based on age and sex. 31

The Canadian Food Inspection Agency (CFIA) announced Friday that Montreal-based Nature's Touch Frozen Food is recalling various brands of frozen mangoes because they may be contaminated with the hepatitis A virus.

A new study by the U.S. Centers for Disease Control and Prevention showed that three-quarters of individuals who became infected with COVID-19 at public events in a Massachusetts county had been fully vaccinated. 19

A Thai hospital morgue overwhelmed by COVID-19 deaths has begun storing bodies in refrigerated containers, resorting to a measure it last took in a devastating 2004 tsunami, as the country grapples with its biggest coronavirus outbreak. 11

A Yale study that found that Canadian clinics were faster than the U.S. to provide opioid treatment during the COVID-19 pandemic highlights the ethical tightrope researchers must walk when studying addiction while using deception in their research gathering. 10

The U.S. Food and Drug Administration has expanded the emergency use authorization of Regeneron Pharmaceuticals Inc's COVID-19 antibody cocktail, enabling its use as a preventive treatment for the illness in certain people. 19

Canada is headed towards a fourth wave of COVID-19 infections, but how severe of a resurgence it'll be depends on how many people are fully vaccinated, warns new national modelling released Friday. The country is seeing an increase in new COVID-19 cases, and thousands more infections are predicted if contacts aren't contained, the modelling indicates. 8

The Delta coronavirus variant surging across the United States appears to cause more severe illness and spread as easily as chickenpox, according to an internal document from the U.S. Centers for Disease Control and Prevention. 19

The protection that vaccines give against coronavirus infection, and potentially severe disease, is highly likely to wane over time so vaccine campaigns will continue for years to come, scientists told the British government's advisory group. 1

The use of fentanyl, cannabis and methamphetamines spiked early in COVID-19 pandemic, according to a Statistics Canada study, which analyzed wastewater in major Canadian cities. 1