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The F.D.A. Authorized a Third Dose of Covid Vaccines for Immunocompromised People.

The F.D.A. Authorized a Third Dose of Covid Vaccines for Immunocompromised People.

The authorization applies to people who received solid organ transplants and others with similarly compromised immune systems.

COVID Vaccine Boosters: the Most Important Questions

COVID Vaccine Boosters: the Most Important Questions

Concerns over waning immunity and SARS-CoV-2 variants have convinced some countries to deploy extra vaccine doses - but it's not clear to scientists whether most people need them.

Is the Delta Variant Making Younger Adults 'Sicker, Quicker'?

Is the Delta Variant Making Younger Adults 'Sicker, Quicker'?

Many doctors on the front lines say unvaccinated patients in their 20s and 30s are becoming more severely ill, and more quickly. But comprehensive data is lacking.

How the Coronavirus Infects Cells - and Why Delta is So Dangerous

How the Coronavirus Infects Cells - and Why Delta is So Dangerous

Scientists are unpicking the life cycle of SARS-CoV-2 and how the virus uses tricks to evade detection.

Pandemic Aid Programs Spur a Record Drop in Poverty

Pandemic Aid Programs Spur a Record Drop in Poverty

The most comprehensive study yet of the federal response to the pandemic shows huge but temporary benefits for the poor - and helps frame a larger debate over the role of government.

New Science Leads to Another CDC Update on Masks

New Science Leads to Another CDC Update on Masks

You could almost hear the collective groan of frustration when the US Centers for Disease Control and Prevention again updated its guidance, encouraging people to wear face masks to stop the spread of COVID-19 - but understanding of the coronavirus has evolved with the virus itself, and this new guidance is based on new information.

Key Social Science Priorities for Long-term COVID-19 Response - World

Key Social Science Priorities for Long-term COVID-19 Response - World

The COVID-19 response continues to be driven by epidemiological priorities, and yet, the epidemic and responses are situated within specific political and health system contexts. Social science brings an understanding of context and draws attention to politics, power and social difference.

COVID Vaccines Have Higher Approval in Less-Affluent Countries

COVID Vaccines Have Higher Approval in Less-Affluent Countries

Surveys show that people in ten low- and middle-income nations are generally more eager to receive the COVID-19 jab than people in two wealthier nations where vaccine is plentiful.

COVID and Mass Sport Events: Early Studies Yield Limited Insights

COVID and Mass Sport Events: Early Studies Yield Limited Insights

UK allowed mass gatherings and attempted to study them but the early results provide limited data on viral transmission.

COVID: Why Are So Many People Against Vaccination?

COVID: Why Are So Many People Against Vaccination?

The number of people who are against getting a COVID-19 vaccine seems to be going up, even as ever more people get vaccinated. What do they base their arguments on?

How the Pandemic is Forcing Women out of the Workforce, Explained in a Comic

How the Pandemic is Forcing Women out of the Workforce, Explained in a Comic

Between child care and homeschooling, women's time is becoming worth less. It could take years to recover lost ground.

Coronavirus vaccines may not work in some people. It’s because of their underlying conditions.

Coronavirus vaccines may not work in some people. It’s because of their underlying conditions.

Early research shows that 15 to 80 percent of people with certain medical conditions, such as specific blood cancers or organ transplants, are generating few antibodies after receiving coronavirus vaccines.

Reduced Sensitivity of SARS-CoV-2 Variant Delta to Antibody Neutralization

Reduced Sensitivity of SARS-CoV-2 Variant Delta to Antibody Neutralization

The SARS-CoV-2 B.1.617 lineage was identified in October 2020 in India1-5. It has since then become dominant in some indian regions and UK and further spread to many countries6. The lineage includes three main subtypes (B1.617.1, B.1.617.2 and B.1.617.3), harbouring diverse Spike mutations in the N-terminal domain (NTD) and the receptor binding domain (RBD) which may increase their immune evasion potential. B.1.617.2, also termed variant Delta, is believed to spread faster than other variants. Here, we isolated an infectious Delta strain from a traveller returning from India. We examined its sensitivity to monoclonal antibodies (mAbs) and to antibodies present in sera from COVID-19 convalescent individuals or vaccine recipients, in comparison to other viral strains. Variant Delta was resistant to neutralization by some anti-NTD and anti-RBD mAbs including Bamlanivimab, which were impaired in binding to the Spike. Sera from convalescent patients collected up to 12 months post symptoms were 4 fold less potent against variant Delta, relative to variant Alpha (B.1.1.7). Sera from individuals having received one dose of Pfizer or AstraZeneca vaccines barely inhibited variant Delta. Administration of two doses generated a neutralizing response in 95% of individuals, with titers 3 to 5 fold lower against Delta than Alpha. Thus, variant Delta spread is associated with an escape to antibodies targeting non-RBD and RBD Spike epitopes.

How Identifying Hotspots of Zoonotic Disease Could Prevent Another Pandemic

How Identifying Hotspots of Zoonotic Disease Could Prevent Another Pandemic

Researchers have developed a tool to assess wildlife markets for risks of zoonotic outbreaks. It can help governments decide on courses of action, with strict veterinary requirements potentially more effective than bans.

Is One Vaccine Dose Enough if You've Had COVID? What the Science Says

Is One Vaccine Dose Enough if You've Had COVID? What the Science Says

Research shows that a previous coronavirus infection plus one dose of vaccine provides powerful protection - but concerns linger.