Health officials say they don’t yet know how far the variant may already have traveled in the U.S.
The signs suggest there will be more deaths and serious illness ahead.
One official says every American could be able to get a shot by the end of March.
Though the pandemic continues, companies believe they're much better equipped to fight it now.
The experimental gel, applied to the back and shoulders, would be a major advance in contraception.
Studies show spinal-cord stimulators can reduce use of powerful pain drugs by 60 percent or more
A revolutionary treatment for cancer hits the U.S. market this year, but it can't be stockpiled.
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