Why do COVID PCR and antigen tests produce different results?
Many factors can affect how likely a COVID-19 test is to correctly spot an infection.
CDC recommends COVID-19 vaccine boosters down to age 12
The move follows the FDA's authorization earlier this week and an hours-long meeting of the CDC's outside advisers.
CDC says COVID test before ending isolation is "best approach"
Some public health experts had criticized the agency for not requiring testing at the end of a shortened isolation.
Omicron now 95% of new COVID infections in U.S., CDC estimates
The once-dominant Delta variant now makes up only a small fraction of cases around the country.
Why antigen tests may still work well for Omicron, despite "reduced sensitivity"
The FDA said some of the rapid at-home tests may have "reduced sensitivity" in detecting Omicron cases, but real-world results are still coming in.
CDC cuts COVID-19 isolation guidance down to 5 days
The agency says science shows the majority of transmission "occurs early in the course of illness."
FDA authorizes second COVID antiviral pill, if no alternative available
The White House expects millions of courses of the drug from Merck and Ridgeback Biotherapeutics by the end of January.
FDA authorizes first antiviral pill to treat COVID-19
Thousands of courses of Pfizer's pills could be available this month.
CDC recommends Pfizer or Moderna over J&J's COVID vaccine
A rare side effect is linked to nine deaths out of more than 16 million people vaccinated with the J&J shot.
COVID vaccines don't need to be changed for Omicron for now, says Fauci
Fauci pointed to early lab data showing that "our booster vaccine regimens work against Omicron."
More than 800,000 Americans have died of COVID. Vaccines could have saved 163,000.
The Kaiser Family Foundation estimated COVID-19's avoidable toll since June, when vaccines became widely available.
Pfizer says new trial data confirms high efficacy of its COVID antiviral pills
Early data from the company's experiments suggest the pill will be effective against all variants, including Omicron.
CDC recommends Pfizer booster shots for Americans as young as 16
Less than a third of Americans 16 to 17 years old will initially be eligible to receive the additional dose.
Omicron: What you need to know about the COVID variant
Officials say boosters are needed to shore up protection against the highly contagious variant.
South Africa probing "sharp increase" in hospitalized children with COVID
Officials say the Omicron variant is driving a "steep rise" of cases across the country.