EXPLAINER: The US investigation into COVID-19 origins

Once dismissed by most public health experts and government officials, the hypothesis that COVID-19 leaked accidentally from a Chinese lab is now receiving scrutiny under a new U.S. investigation.

Experts say the 90-day review ordered on May 26 by President Joe Biden will push American intelligence agencies to collect more information and review what they already have. Former State Department officials under President Donald Trump have publicly pushed for further investigation into virus origins, as have scientists and the World Health Organization.

Read the full story and more from Associated Press.