abcnews

Russia pulls troops near Ukraine: analysts explain what is behind the build-up

WHO warns against global increase in COVID cases, deaths as the world approaches ‘highest infection rate’

Scientists investigate possible link between Johnson & Johnson, AstraZeneca vaccines with blood clots

Biden chooses first woman as army secretary

High school kids get the COVID-19 vaccine. What do they think?

This is why COVID cases increase in Toronto despite early closure

What to know about ‘passports’ of the COVID-19 vaccine and why it is controversial?

What to know about expected but rare ‘breakthrough’ COVID cases

COVID-19 origin: what to know about the search for the onset of the virus

Research shows promising development in hunt for HIV vaccine

Illinois bar linked to 46 COVID-19 cases, school closure: CDC

COVID-19 is increasing in Michigan. Why this may be a warning.