Centers for Disease Control and Prevention

The hope is that an extra shot will shore up protection as coronavirus infections once again are on the rise.
U.S. regulators hope an extra vaccine dose, which still needs the CDC's approval, will enhance children's protection as infections rise once again.
The provisional 2021 total translates to roughly one U.S. overdose death every 5 minutes.
The surprising cases of hepatitis date back to late October in children under 10.
U.S. health officials are restating their recommendation that Americans wear masks on planes, trains and buses, despite a court ruling last month that struck down a national mask mandate on public transportation.
The man is largely asymptomatic, and health experts say the risk the virus poses to people remains low.
"We continue to fail to protect our youth from a preventable cause of death,” researchers said, based on CDC mortality data.
The mask requirement "remains necessary for the public health," the CDC told the Justice Department.
A federal judge in Florida ruled against the Center for Disease Control's COVID-19 mask mandate for public travel.
The CDC said it wanted more time to study the BA.2 omicron subvariant that is now responsible for the vast majority of cases in the U.S.