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Daily briefing: Why the Delta variant spreads so fast

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People wait for admission outside the emergency ward of a hospital tending to Covid-19 patients, Indonesia.

A queue at a hospital in Surabaya, Indonesia, that treats people with COVID-19. Indonesia has been hard hit by the Delta variant.Credit: Juni Kriswanto/AFP/Getty

How Delta achieves its ultrafast spread

Since first appearing in India in late 2020, the Delta variant of SARS-CoV-2 has become the predominant strain in much of the world. Researchers might now know why Delta has been so successful: people infected with it produce far more virus than do those infected with the original version of SARS-CoV-2, making it very easy to spread. A study of some of the first people in China to be infected with Delta showed that their viral load — a measure of the density of viral particles in the body — was roughly 1,000 times higher than in people infected with the original coronavirus strain.

Nature | 4 min read

Publishers let authors correct their names

In an effort to expand inclusivity for transgender researchers, publishers, including Springer Nature, Elsevier, Wiley and the American Association for the Advancement of Science, have adopted policies that allow rapid and discreet author name changes to be made on digital editions of published works. “This was a safety issue, a personal-equity issue and a labour issue,” says informatics researcher Theresa Jean Tanenbaum. Search engines and other indexes might need time to reflect the change, and PDF documents can complicate the issue when they are considered the historical article of record.

Nature | 6 min read

Read more: Theresa Jean Tanenbaum argues for publishers to let transgender scholars correct their names (Nature | 6 min read)

Repurposed medicines for long COVID

For ‘long COVID’ — long-term health problems that sometimes follow a bout of COVID-19 — drug development is even more of a shot in the dark than usual. The condition is still poorly understood and vaguely defined, and its prevalence is unknown. The risks of making new drugs are prohibitive, so repurposed or repositioned medicines seem to be the best hope. Several trials have begun in the United States, spurred by a US$1.15-billion funding initiative from the National Institutes of Health.

Nature Biotechnology | 16 min read


This far into the pandemic, there's a risk of becoming numb to grim statistics on rising infections and deaths. But that was impossible when I read reports that India’s true death toll is likely to be well over 3 million — ten times the official figure. It’s a frightening reminder of what the Delta variant could do in countries with low vaccination rates. Globally, the official death toll is now over 4 million, and trackers of excess deaths show that total fatalities are almost certainly far higher. We mustn’t become immune to all we’ve lost.

Helen Pearson, Nature Chief Magazine Editor

Features & opinion

An acid test for responsible assessment

A leading UK university has become mired in a public dispute over how it is assessing researchers’ performance. The University of Liverpool plans to cut 32 posts from its Faculty of Health and Life Sciences — and it’s basing decisions on controversial measures, notably research income. Signatories to the San Francisco Declaration on Research Assessment (DORA) — which include Liverpool — pledge to evaluate researchers accurately and wisely. The organization behind DORA is in talks with the university, but emphasizes that it is not a regulatory body. The situation prompts a Nature editorial to ask, “If a university insists on a system of assessing its academics that seems both unfair and unrepresentative of how research is done… does the research community need a body, or a mechanism, with the remit and resources to monitor the declaration and act more like a watchdog?”

Nature | 6 min read

How to create a perfect protocol

A clear scientific protocol — a set of detailed instructions for a specific experimental method — ensures reproducibility and accountability. Five scientists and journal editors offer their tips for structuring a great protocol, and some innovative ways to disseminate and update them.

Nature | 9 min read

Play is serious business for elephants

If a young male elephant puts his trunk on your head, it means he wants to play. So begins the essential act of having a good time — offering a low-risk way to develop essential skills and build trust. Behavioral ecologist Caitlin O'Connell takes us inside the world of Namibia’s elephants to reveal the benefits of a good romp.

Scientific American | 12 min read

Infographic of the week

Thermal-shock synthesis

Credit: SEM images reprinted with permission from Yao, Y. et al. Science 359, 1489–1494 (2018).

Start-up company HighT-Tech has developed a technique to make alloys that could improve catalysts or be used to build better batteries. The company won this year’s Spinoff Prize — an award from Nature Research and Merck for early-stage university spin-off companies. HighT-Tech’s process involves heating materials so rapidly that different metals can mix, even when this wouldn’t be possible with conventional melting processes. “We can finely tune the properties, like catalytic properties, by adjusting the different elements’ ratios,” says HighT-Tech’s vice-president Chengwei Wang. “Because we can add multiple elements, we can have a similar performance to a precious-metal catalyst by using this cheap metal.” (Nature | 6 min read)

Quote of the day

“We thought dogs would behave like children under age 5 and apes, but now we speculate that perhaps dogs can understand when someone is being deceitful.”

Comparative cognition researcher Ludwig Huber found that dogs will ignore you if they know you are lying (unlike young children and some non-human primates). (New Scientist | 3 min read)


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Flora Graham, senior editor, Nature Briefing

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