The omicron variant possesses numerous mutations in the spike protein, the knob-like protrusions (in red) that allow the virus to invade other cells.
Juan Gaertner/Science Photo Library via Getty Images
It’s too early to say whether the newly identified omicron variant is going to overtake delta. But particular mutations in the new strain have researchers deeply concerned.
For many parents, the long-awaited COVID-19 vaccine authorization for younger kids can’t come soon enough.
Vladimir Vladimirov/E+ via Getty Images
Pediatric clinical trials for the COVID-19 Pfizer vaccine for children ages 5 to 11 have shown that the Pfizer shot is safe and effective.
Discuss with your doctor whether or not you need a booster – and if so, which vaccine will work best for you.
Justin Sullivan/Getty Images News via Getty Images
As boosters are authorized for all three COVID-19 shots available in the US, the ability to swap out vaccine types looks to be a boon to the immune system.
No third dose for now.
AP Photo/Robert F. Bukaty
An FDA panel has voted against recommending approval of a booster COVID-19 shot for the general population – disappointing some public health officials.
COVID can cause heart inflammation, abnormal heart rhythms, blood clots in the legs and lungs, stroke, and heart failure.
Recovering from COVID and then getting vaccinated, known as hybrid immunity, is more potent than being infected or vaccinated alone.
Vaccines don’t ward off every single infection but they do massively lower the risk.
Education Images/Universal Images Group via Getty Images
Vaccines can’t provide 100% protection, so it’s not a failure or surprise when some vaccinated people get sick with COVID-19. The good news is their cases are much less likely to be severe or fatal.
ATAGI is grappling with competing concerns, considerable uncertainty, and a constantly changing landscape.
The Lambda variant accounts for almost all new cases in Peru, which has the world’s highest COVID death toll per capita.
Preliminary evidence suggests Lambda has an easier time infecting our cells and is a bit better at dodging our immune systems. But vaccines should still do a good job against it.
The freedom of going mask-free is still a ways off for kids under age 12.
Juan Monino/E+ via Getty Images
As many teens and adults in the US restart their social lives, parents of children under the age of 12 wonder when their kids will also be able to experience the freedom that comes with vaccination.
COVID vaccines don’t contain any live virus to shed. Here’s the science to put the myth of viral shedding after the COVID vaccine to bed.
One of this and one of that might be a good strategy to coronavirus vaccination.
SOPA Images/LightRocket via Getty Images
Various companies use different ingredients and different delivery systems in their COVID-19 vaccines. Researchers are investigating whether it’s better for individuals to mix what’s available.
Vaccinated people are well protected from getting sick, but could they inadvertently transmit the coronavirus?
Noam Galai/Getty Images Entertainment via Getty Images
The COVID-19 vaccines are a smash success. But that doesn’t mean they keep every vaccinated person completely free of the coronavirus.
The AstraZeneca vaccine is already in use in many places.
AP Photo/Christophe Ena
AstraZeneca just announced results from its US-based trial. It found the vaccine to be 79% effective and safe for use, despite recent concerns around reports of blood clots.
There have been a few accounts of patients who have tested positive, then negative, then positive again for COVID-19.
So, if you have ever tested positive, there is a chance you could contract the virus again. And you could infect other people. You should still take the necessary precautions.
Sue Ogrocki/AAP Image
A new review from the Australian Academy of Health and Medical Sciences says managing the pandemic into 2021 will mean persisting with the measures that have made Australia’s response successful so far.
People wearing masks walk in front of Pfizer’s headquarters in New York City. Pfizer and BioNtech are on track with a vaccine that is 90 per cent effective, say preliminary results, but they are not the only ones in the race.
AP Photo/Bebeto Matthews
Canada has set aside a total of 414 million doses of different types of vaccine. Some exploit known mechanisms, others are based on previously untested approaches.
Dr. Jonas Salk, left, developed the first effective polio vaccine.
Underwood Archives/Getty Images
A tragic error showed how complicated it can be to distribute vaccines on a mass scale.
Visitors look at new anti-SARS outfits for medical workers on display Thursday Nov. 6, 2003 in Shanghai, China, as the country braced for a resurgence. The disease never made a comeback.
AP Photo/Eugene Hoshiko
COVID-19 and SARS are both deadly – but different. SARS symptoms were quick to appear, making it easier to contain. Because health officials were able to contain it, the virus died off.