Battles over mask mandates rage as pediatric COVID-19 cases rise.

Plus, the CDC says it is seeing a slight drop in vaccine efficacy when it comes to preventing hospitalization.

Watch video on channel "ABC News"
Biden to donate 500M vaccine doses, calls for ‘all hands on deck’.

Biden to donate 500M vaccine doses, calls for ‘all hands on deck’.

President Joe Biden announced the U.S. will buy and donate 500 million doses of the Pfizer vaccine to low-income countries around the world.

Some migrant families allowed to stay in US as thousands deported.

Some migrant families allowed to stay in US as thousands deported.

President Joe Biden is facing backlash amid the growing crisis on the border in Del Rio, Texas. WATCH the ABC News Live Stream Here: SUBSCRIBE to ABC NEWS: Watch More on LIKE ABC News on FACEBOOK FOLLOW ABC News on TWITTER: #ABCNLUpdate #President...

Biden administration struggles to explain treatment of Haitian migrants in Texas - ABC News.

Biden administration struggles to explain treatment of Haitian migrants in Texas - ABC News.

A big decision by the FDA today could mean millions of Americans might be eligible for COVID-19 booster shots as early as this Friday. Plus, the Biden administration is struggling to explain the treatment of Haitian migrants by border patrol agent...

Biden administration faces criticism over crisis at US southern border.

Biden administration faces criticism over crisis at US southern border.

The White House is facing a political battle on both sides over its handling of the massive surge of Haitian migrants attempting to gain entry into Del Rio, Texas.

Gabby Petito manner of death ruled 'homicide'

Gabby Petito manner of death ruled 'homicide'

Chief legal analyst Dan Abrams discusses how the autopsy results for Gabby Petito could affect the search for Brian Laundrie.