Why are COVID Vaccination Rates Still Low in Some Countries?
Limited supplies remain a problem, but experts say other challenges now include unpredictable deliveries, weak health care systems and vaccine hesitancy.
U.S. Vaccination Drive is Bottoming Out as Omicron Subsides
The vaccination drive in the U.S. is grinding to a halt, and demand has all but collapsed in places where many weren't interested in the shots to begin with.
Is Omicron Leading Us Closer to Herd Immunity Against COVID?
Is omicron leading us closer to herd immunity against COVID-19? Experts weigh in on the question.
Estimated 73% of US Now Immune to Omicron: Is That Enough?
Millions of individual Americans' immune systems now recognize the virus and are primed to fight it off if they encounter omicron, or even another variant.
Study: COVID Booster Effectiveness Wanes But Remains Strong
An early look at the performance of COVID-19 booster shots during the recent omicron wave in the U.S. hinted at a decline in effectiveness, though the shots still offered strong protection against severe illness.
Rehab for Long COVID Gives Hope, While Condition Continues to Puzzle
Researchers estimate as many as 1 in 3 people infected with COVID-19 experience long COVID.
Can You Get Long COVID After an Omicron Infection?
It's too early to know for sure, but many doctors believe it's possible to have long-term effects from the omicron variant of the virus.
CDC Backs Moderna COVID-19 Shots after Full U.S. Approval
The Centers for Disease Control and Prevention on Friday continued its endorsement of Moderna's COVID-19 vaccine for adults, now that U.S. regulators have given the shots their full approval.
New Study Reveals LGBTQ+ People Leading the Way in COVID-19 Vaccinations
A new study suggests that LGTBQ+ people are leading the way when it comes to getting vaccinated against COVID-19, as well as being more concerned about the pandemic and more confident in the vaccines.
Day 6 of Covid, and a Rapid Antigen Test Comes Back Positive. Stay Home, Say Virologists.
What does it mean if a person's rapid antigen test result comes back positive after five days of isolation due to COVID-19?
Omicron Amps Up Concerns About Long COVID And Its Causes
with omicron sweeping across the globe, scientists are racing to pinpoint the cause of the bedeviling condition and find treatments before a potential explosion in long COVID cases.
How Many Times Can I Reuse My N95 Mask?
The U.S. Centers of Disease Control and Prevention says health care workers can wear an N95 mask up to five times. But experts say how often the average person can safely wear one will vary depending on how it's used.
Moderna Begins Testing Omicron-Matched COVID Shots in Adults
Moderna has begun testing an omicron-specific COVID-19 booster in healthy adults.
CDC Study Shows Booster Shots Needed Against Omicron
Three studies released Friday offered more evidence that COVID-19 vaccines are standing up to the omicron variant, at least among people who received booster shots.
Patient, Beware: Some States Still Pushing Ineffective Covid Antibody Treatments
Health officials warn that certain treatments no longer work against the highly contagious version of the virus that causes COVID-19.
What Does it Mean for COVID-19 to be Endemic?
Here's a look at what endemic means and the implications for the future.
Biden to Give Away 400 Million N95 Masks Starting Next Week
The White House announced Wednesday that the masks will come from the government's Strategic National Stockpile, which has more than 750 million of the highly protective masks on hand.
Israel Study: 4th Vaccine Shows Limited Results with Omicron
Preliminary research indicates a fourth dose of the coronavirus vaccine provides only limited defense against the omicron variant.
What Patients Can Learn From One Negative Rapid Test (Hint: Very Little)
While home antigen testing remains a useful — and underutilized — tool to curb the pandemic, experts say, it is often misused and may provide false confidence.
How Will Forthcoming Website for Free Virus Tests Work?
A new federal website to request free test kits launches Wednesday, with the first shipments going out to Americans by the end of the month.