A French study found a four to sixfold reduction in neutralisation against the delta variant compared with the alpha (Kent) variant.
The freedom of going mask-free is still a ways off for kids under age 12.
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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.
Can you really fake a covid test with soft drinks?
There's a way for parents to spot the fraud.
The latest advice is to offer COVID-19 vaccines to women at any stage of pregnancy to protect them from a higher risk of severe disease – and to give their babies an early boost of antibodies.
Colorized scanning electron micrograph of a cell (orange) infected with UK B.1.1.7 variant SARS-CoV-2 virus particles (green), isolated from a patient sample. Image captured at the NIAID Integrated Research Facility (IRF) in Fort Detrick, Maryland.
Variants of the original SARS-CoV-2 are now in wide circulation. That means the third wave of COVID-19 has come with new questions about the variants, their effects and what might come next.
Immunity to COVID-19 appears to be generated in different ways in different subgroups of people.
Vaccination produces a much stronger and more consistent immune response than infection.
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If you’ve already had the coronavirus and recovered, you might be tempted to give the vaccine a pass. A scientist explains why the shot offers the best protection against future infection.
Antibodies (white) binding to a coronavirus (red and orange).
Antibodies continue to evolve for months after a COVID infection has cleared.
New mRNA vaccines use genes from the coronavirus to produce immunity.
Andriy Onufriyenko/Moment via Getty Images
So far, most vaccines in the US are mRNA vaccines. These represent a new technology and are likely to take over the vaccine world. But how do they work? What are their weaknesses? Five experts explain.
New treatments target different stages of COVID-19, including before patients become sick enough to need a hospital.
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A year after it became clear that COVID-19 was becoming a pandemic, there is still no cure, but doctors have several innovative treatments. Some are keeping patients out of the hospital entirely.
Antibodies (blue) neutralising SARS-CoV-2 (orange), the virus that causes COVID-19.
Our research could be important for developing more effective vaccines in the future.
Arturs Budkevics/ Shutterstock
We mapped the genes of B cells to better understand why some develop immunity and others don’t.
Research shows the breast milk of women who have recovered from COVID-19 offers a source of COVID-19 antibodies.
Researchers don’t fully understand the composition of breast milk and its benefits. Beyond nutrition, it contains enzymes, hormones and the mother’s antibodies — including antibodies for COVID-19.
Study shows that the Novavax vaccine is effective against the dominant variant of COVID-19 in South Africa.
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The results indicate that the vaccine efficacy in the UK was 89% for individuals who received at least two doses of vaccine. In South Africa, the vaccine efficacy was 60% in people without HIV.
Neutralizing antibodies attach to the tips of the spike proteins of the SARS CoV-2 virus.
A biologist explains what proteins do in viruses, how they interact with human cells, how the vaccine delivers mRNA into the cell and how antibodies protect us.
Long-term protection will depend on the ‘memory response’ developed by our immune systems – and the initial signs are promising.
Health care workers wait in line for vaccinations at a site in Los Angeles.
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With vaccine shortages looming, experts are debating whether it is important to receive two doses or whether it’s better to give one dose to more people and give a second when the supply is better.
A new study has shown that there are sex-based differences in how we respond to the coronavirus.
Chronic obstructive pulmonary disease is the third leading cause of death in the United States.
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A new discovery offers hope for ways to treat a debilitating disease that has become a leading cause of death in the US..
Under relaxed public health restrictions, deaths will spike far before herd immunity is achieved.
AP Photo/Mark Lennihan
Some have suggested the US allow healthy people to return to normal life, catch the coronavirus and get the population to herd immunity. The science says this plan is doomed to fail from the start.