Here’s what the results may mean for you.
Some scientists believe that a clearer picture of Covid vaccine efficacy could have emerged sooner if investigators had tracked certain immune cells, not just antibodies.
Some reinfection questions, answered.
Another patient who had the same treatment did not survive. But the demonstration of the technique could help with other cancers.
There is no universal definition of the complex condition, but clues about causes and potential treatments are beginning to emerge.
Researchers don’t fully understand the menstrual cycle’s effects on the immune system, but experts say there are reasons some may feel sick at certain points.
The under-5 Covid vaccine should be approved.
We need a new normal.
Having Covid can be a wildly confusing experience. But you can still make a plan to get through the course of illness.
Scientists are exploring a theory suggesting that exposure to one respiratory virus helps the body fend off competing pathogens.
If you have symptoms but get a negative home test result, you may need to keep taking precautions and test again (and again).
Experts say that the most vulnerable would benefit from a second booster soonest.
The F.D.A. temporarily halted efforts to authorize the Pfizer-BioNTech vaccine for young children amid several unexpected findings. The coming weeks should bring clarity.
The treatment could be lifesaving for many who cannot get protection from the vaccine, but confusion about the drug has made some doctors slow to prescribe it.
The virus does not infect nerve cells that detect odors, researchers have found. Instead, it attacks nearby supporting cells.
A flurry of new studies suggest that several parts of the immune system can mount a sustained, potent response to any coronavirus variant.
Could he be having a stroke — or was it something more unusual?
She’s the third person ever to be cured. Researchers announced that the new approach holds the potential for curing more people of racially diverse backgrounds.
It’s not clear whether three doses of the Pfizer-BioNTech vaccine will adequately protect young children. But the F.D.A. may authorize the first two doses anyway.
A 90-minute walk, jog or bike ride after getting vaccinated may boost your body’s immune response.
The immunity you gain after a Covid-19 infection might not be enough to fend off the virus again. Here’s what to know.
Nasal vaccines under development around the world may make better boosters by stopping the coronavirus in the airways.
Two early recipients of CAR T immunotherapy were free of a blood cancer nearly a decade after receiving the therapy.
For those with underlying medical conditions, the latest pandemic wave has still posed a threat.
As Omicron cases skyrocket, more vaccinated people may get “hybrid” immunity after a breakthrough infection. But experts still encourage precautions.
Future surges will be less likely to make us seriously ill.
In a study of members of the Armed Forces, people who developed multiple sclerosis first had Epstein-Barr virus.
Evidence is mounting that a garden-variety virus that sometimes causes mono in teens is the underlying cause of multiple sclerosis, a rare neurological disease in which the immune system attacks the brain and spinal cord, stripping away protective insulation around nerve cells, called myelin.
It’s still unclear how exactly the virus—the Epstein-Barr virus (EBV)—may trigger MS and why MS develops in a tiny fraction of people. About 95 percent of adults have been infected with EBV, which often strikes in childhood. MS, meanwhile, often develops between the ages of 20 and 40 and is estimated to affect around one million people in the US. Yet, years of evidence have consistently pointed to links between the childhood virus and the chronic demyelinating disease later in life.
With a study published today in Science, the link is stronger than ever, and outside experts say the new findings offer further “compelling” evidence that EBV isn’t just connected to MS; it’s an essential trigger for the disease. The study found, among other things, that people had a 32-fold increase in risk of developing MS following an EBV infection in early adulthood.
Yes, you can get “flurona.” But it’s probably not as bad as it sounds.
Everyone should get a booster shot. In the long run, though, doses every few months aren’t a viable public health strategy, scientists say.
People with compromised immune systems are getting unapproved fourth or fifth Covid-19 shots, despite uncertainty about their safety or effectiveness.
Compared with earlier variants, Omicron may cause less damage to the lungs, new animal research suggests.
They do seem to offer significant protection against severe illness, but the consequences of rapidly spreading infection worry many public health experts.
In the lab, immune cells put up a strong fight against Omicron, suggesting that vaccines will be able to prevent the worst outcomes of the virus variant.
Whatever the variant may mean for the young, it’s already clear that it can be deadly for the old.
The research may help explain why people who are overweight and obese have been at higher risk of severe illness and death from Covid.
Scientists in a cutting-edge laboratory do part of the work. Local health workers on foot do the rest.
A new mathematical analysis strengthens concerns about the effects of the new variant on the pandemic’s course.
Many public health experts were opposed to a boosters-for-all approach. The new variant is changing some minds.
Intense research into the new coronavirus variant first identified in southern Africa, has just begun. World leaders have urged people not to panic — and to get vaccinated, if they can.
A “Frankenstein mix” of mutations raises concerns, but the variant may remain vulnerable to current vaccines. If not, revisions will be necessary.
Should children who have had Covid-19 get a single vaccine dose?
Health officials approved mix-and-match Covid booster shots, but didn’t say whether it’s better to switch vaccines or stick with your original shot.
We turned to five experts to answer these frequently-asked questions.
Recipients of the Moderna and the J.&J. vaccines may receive extra doses, although the shots continue to prevent illness and death.
The F.D.A. may authorize booster shots of vaccines different from the ones that Americans originally received. The science behind the move is promising.
Deaths among people who have been fully vaccinated remain rare, but older adults and those with compromised immune systems are at much higher risk.
Viral evolution is a long game. Here’s where scientists think we could be headed.
So-called natural immunity varies from patient to patient, scientists say. Immunization is still the best choice after recovering from the disease.
Pregnant women should get a Covid-19 vaccine.