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Category: Science/mathematics

Biden: Intelligence community split on Covid-19 origin

Biden: Intelligence community split on Covid-19 origin

Politico reports: President Joe Biden said Wednesday that the U.S intelligence community is split between two origin theories for the Covid-19 pandemic. In a statement Wednesday, Biden notably did not detail the two theories between which the intelligence community is split. The president’s statement did note that he had ordered a review of the pandemic’s origins, “including whether it emerged from human contact with an infected animal or from a laboratory accident,” but did not say whether either of those…

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How do we know that Covid isn’t a bioweapon?

How do we know that Covid isn’t a bioweapon?

Since the revival of the lab-leak theory will once again enliven conspiracy theorists, it’s worth being reminded why it’s wildly implausible that SARS-CoV-2 was created in the Wuhan Institute of Virology as a biological weapon. (Also keep in mind that the possibility that the virus accidentally leaked from the lab does not contradict the still widely held view that it originated in the wild.) Last July, Ruby Prosser Scully wrote: [C]reating this virus in a lab and knowing that it…

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Intelligence on sick staff at Wuhan lab fuels debate on Covid-19 origin

Intelligence on sick staff at Wuhan lab fuels debate on Covid-19 origin

The Wall Street Journal reports: Three researchers from China’s Wuhan Institute of Virology became sick enough in November 2019 that they sought hospital care, according to a previously undisclosed U.S. intelligence report that could add weight to growing calls for a fuller probe of whether the Covid-19 virus may have escaped from the laboratory. The details of the reporting go beyond a State Department fact sheet, issued during the final days of the Trump administration, which said that several researchers…

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The once dismissed lab-leak theory is becoming increasingly plausible

The once dismissed lab-leak theory is becoming increasingly plausible

Donald G. McNeil Jr. writes: In early spring 2020, I reported an article for The New York Times on which I put the tentative headline: “New Coronavirus Is ‘Clearly Not a Lab Leak,’ Scientists Say.” It never ran. For two reasons. The chief one was that inside the Times, we were sharply divided. My colleagues who cover national security were being assured by their Trump administration sources — albeit anonymously and with no hard evidence — that it was a…

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The 60-year-old scientific screwup that helped Covid kill

The 60-year-old scientific screwup that helped Covid kill

Megan Molteni writes: Early one morning, Linsey Marr tiptoed to her dining room table, slipped on a headset, and fired up Zoom. On her computer screen, dozens of familiar faces began to appear. She also saw a few people she didn’t know, including Maria Van Kerkhove, the World Health Organization’s technical lead for Covid-19, and other expert advisers to the WHO. It was just past 1 pm Geneva time on April 3, 2020, but in Blacksburg, Virginia, where Marr lives…

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Hundreds of epidemiologists expected mask-wearing in public for at least a year

Hundreds of epidemiologists expected mask-wearing in public for at least a year

The New York Times reports: When federal health officials said on Thursday that fully vaccinated Americans no longer needed to wear masks in most places, it came as a surprise to many people in public health. It also was a stark contrast with the views of a large majority of epidemiologists surveyed in the last two weeks by The New York Times. In the informal survey, 80 percent said they thought Americans would need to wear masks in public indoor…

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Vaccines seem to work well against coronavirus variants. It’s also complicated

Vaccines seem to work well against coronavirus variants. It’s also complicated

STAT reports: The question about how Covid-19 vaccines stand up to coronavirus variants often gets distilled to: Do they work? The simplest answer is yes. People who’ve received one of the highly powerful vaccines don’t need to be too worried about the variants for now, experts say. But the complete answer is more complicated. The real question isn’t whether the vaccines work, but how well they do. Even the best vaccines allow some “breakthrough infections” — infections in people who’ve…

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How a small city in Brazil may reveal how fast vaccines can curb Covid

How a small city in Brazil may reveal how fast vaccines can curb Covid

Science News reports: The city of Serrana in Brazil is a living experiment. The picturesque place, surrounded by sugarcane fields, is nestled in the southeast of one of the countries hit hardest by COVID-19. By the end of March, daily deaths in Brazil surged to 3,000 on average a day, a high in a pandemic that has claimed more than 405,000 lives there — the second worst death toll of any country in the world behind only the United States….

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CDC Covid messaging has persistently lagged behind scientific findings

CDC Covid messaging has persistently lagged behind scientific findings

STAT reports: Nearly a year ago, amid concerns about how to prevent transmission of the virus causing Covid-19, scientists were beginning to conclude that rigorous disinfection of surfaces — say, fogging them or deep-cleaning with bleach — was overkill. Academics were warning that the risk of so-called fomite transmission was wildly overblown. In the fall, research from Israel and Italy found that the virus couldn’t even be cultured from surfaces in hospital infectious disease units. By February of this year,…

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Why did it take so long for Covid aerosol transmission to be officially confirmed?

Why did it take so long for Covid aerosol transmission to be officially confirmed?

Zeynep Tufekci writes: A few sentences have shaken a century of science. A week ago, more than a year after the World Health Organization declared that we face a pandemic, a page on its website titled “Coronavirus Disease (Covid-19): How Is It Transmitted?” got a seemingly small update. The agency’s response to that question had been that “current evidence suggests that the main way the virus spreads is by respiratory droplets” — which are expelled from the mouth and quickly…

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NASA reboots its role in fighting climate change

NASA reboots its role in fighting climate change

Nature reports: NASA is best known for exploring other worlds, whether that’s sending astronauts to the Moon or flying helicopters on Mars. But under US President Joe Biden, the space agency intends to boost its reputation as a major player in studying Earth — especially with an eye towards fighting climate change. “Biden made clear that climate is a priority,” says Waleed Abdalati, director of the Cooperative Institute for Research in Environmental Sciences in Boulder, Colorado. “There’s a clear role…

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Once a Covid hotspot, Italian village now intrigues researchers with ‘super-immune’ cases

Once a Covid hotspot, Italian village now intrigues researchers with ‘super-immune’ cases

NBC News reports: Paola Bezzon thought her sniffles in December were just a seasonal cold until a serology test months later found coronavirus antibodies in her blood. And not just normal levels of antibodies. Researchers say she is “super-immune” — a person whose body seems to make more antibodies than normal. “I don’t know why I have all these antibodies, but they are such a lifeline for me,” she said. “They make me feel safe even though I haven’t had…

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Severe Covid in young people can mostly be explained by obesity – new study

Severe Covid in young people can mostly be explained by obesity – new study

By Nerys M Astbury, University of Oxford; Carmen Piernas, University of Oxford, and Min GAO, University of Oxford From the start of the pandemic, it was clear that some people who were infected with the coronavirus were experiencing more severe illness, which increased their chances of being hospitalised, admitted to an intensive care unit (ICU) or dying. As we age, a weaker immune system and chronic health conditions could influence the way our body responds to the virus. Indeed, age…

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No safer from Covid indoors at 6 feet or 60 feet, MIT researchers say

No safer from Covid indoors at 6 feet or 60 feet, MIT researchers say

CNBC reports: The risk of being exposed to Covid-19 indoors is as great at 60 feet as it is at 6 feet — even when wearing a mask, according to a new study by Massachusetts Institute of Technology researchers who challenge social distancing guidelines adopted across the world. MIT professors Martin Z. Bazant, who teaches chemical engineering and applied mathematics, and John W.M. Bush, who teaches applied mathematics, developed a method of calculating exposure risk to Covid-19 in an indoor…

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India’s massive Covid surge puzzles scientists

India’s massive Covid surge puzzles scientists

Nature reports: The pandemic is sweeping through India at a pace that has staggered scientists. Daily case numbers have exploded since early March: the government reported 273,810 new infections nationally on 18 April. High numbers in India have also helped drive global cases to a daily high of 854,855 in the past week, almost breaking a record set in January. Just months earlier, antibody data had suggested that many people in cities such as Delhi and Chennai had already been…

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Sleeping too little in middle age may increase dementia risk, study finds

Sleeping too little in middle age may increase dementia risk, study finds

The New York Times reports: Could getting too little sleep increase your chances of developing dementia? For years, researchers have pondered this and other questions about how sleep relates to cognitive decline. Answers have been elusive because it is hard to know if insufficient sleep is a symptom of the brain changes that underlie dementia — or if it can actually help cause those changes. Now, a large new study reports some of the most persuasive findings yet to suggest…

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