Girl who died of bird flu did not have widely-circulating variant

27 days ago Nature

Investigations into how the girl was exposed to the virus are underway. When did you receive the virus sample from the young girl? The sample was first tested at the National Institute of Public Health in Phnom Penh, and then transferred to us. The viral load in the sample was high enough that we could amplify the whole influenza genome in one go. I’m hoping that we’ll get more information on the poultry samples surrounding the case soon.
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Study of the electromechanical coupling process before the 2020 Ms 6.4 Yutian, China earthquake

Since then, the LURR values in this region began to weaken before the Yutian earthquake (Fig. In order to evidence that stress accumulation in Yutian earthquake leads to the change of LURR, we constructed a profile. Velocity field was calculated using quasi-observational combination analysis26, GNSS (global navigation satellite system) at MIT (GAMIT)/Global Kalman filter (GLOBK)27,28,29 of the GPS velocity field associated with mainland China. When the accumulation of tensile stress exceeded the critical rupture state, the Yutian M s 6.4 earthquake occurred in 2020. In addition, the change in the geo-electric field LURR time curve and the LURR value were close to 1.0.

5 months ago Nature

Stress and uncertainty drag down graduate students’ satisfaction

Credit: Illustration by Cathal DuaneFaced with financial hardships, multiple demands on their time and uncertain career prospects, some graduate students are losing faith in their chosen career path. Nature’s graduate student survey This article is the first of six linked to Nature’s global survey of graduate students. I think the PhD system is exploitive of graduate students. PhD students at my institution take on lots of (non-voluntary, non-paid) mentoring of undergraduates, master’s and even younger PhD students. At the start of the programme, he struggled with some of the questions that countless graduate students before him had faced.

5 months ago Nature

Spatio-temporal dynamics of three diseases caused by Aedes-borne arboviruses in Mexico

Based on socio-economic variables in 2005 and 2015, we built a time series ARIMA model to project the socio-economic variables from 2012 to 2019. The Pearson correlation coefficient, r, can take a range of values from +1 to −1. In addition, we summarized the impact of socio-economic features, and climate features separately for different clusters. For example, for a given method, the importance of socio-economic features is calculated by taking the average importance of these features. Then, the weight/importance of socio-economic and climate features are calculated in the following way: weight/importance of socio-economic features = socio-economic attributes impact/(socio-economic attributes impact + climate impact).

4 months ago Nature

Leaders can choose to prevent pandemics

Political leaders can choose to prevent it. This transformed system would be backed by an international fund that finances measures to prevent and respond to new health threats. The global COVID-19 summits have brought welcome funding announcements and leaders have spoken at WHO gatherings, but action has not been sustained. Global pandemic prevention is estimated to cost $10.5 billion each year — a sizeable sum, but a fraction of the cost of not being prepared. If it is to remain the coordinating authority for global health, member states must give it the authority, independence and funding to perform that role well.

5 months ago Nature

China’s COVID wave has probably peaked, model suggests

For close to three years, China’s strict zero-COVID policy kept infections at bay. According to Lai’s analysis, shown to Nature but not yet published or peer reviewed, close to half of China’s cities experienced a peak in infections between 10 December and 31 December. Online searchThis aligns with peak times that Lai estimated using searches for terms such as ‘fever’ and ‘COVID’ on the Internet search platform Baidu. On 14 January, China’s National Health Commission reported that close to 60,000 people have died from COVID since 8 December 2022. The figure includes 5,503 deaths from COVID-19 respiratory failure, as well as more than 54,000 deaths in people with from COVID-19 and other underlying conditions.

2 months ago Nature

Intraday adaptation to extreme temperatures in outdoor activity

Intraday activity substitution as an adaptation strategyTo provide direct evidence on intraday temporal substitution as a short-term temperature adaptation strategy, we examine the impacts of temperature on activity quantity during different periods of the day. We use the binned average daily temperature as the explanatory variable and separately run the regression in Eq. Temperature distribution on days with the daily average temperature in 30–35 °C and 35–40 °C bins are presented, respectively. Each line represents the within-day activity pattern for days lying in each daily average temperature range. The monotonic dose–response function between activity time shift Δt and daily average temperature suggests a continuous increase in late-night activity with hotter temperatures.

2 months ago Nature

Non-lethal fungal infection could reduce aggression towards strangers in ants

Preparation of corpses (untreated)Old uninfected and infected ants were selected randomly from their colonies. Preparation of hexane-washed dummiesOnly uninfected ants from uninfected colonies were used to prepare washed dummies used in behavioural assays. Preparation of uninfected ant dummies supplemented with n-C23Only uninfected workers were used as dummies. Hexane-washed corpses treated with cuticular extracts from uninfected ants and n-C23Hexane-washed uninfected corpses were treated with cuticular extracts from uninfected ants as described previously. We individually extracted the CHC profile of dummies (N = 4) and treated ants (N = 6) for 20 min in 200 μl of hexane.

1 month ago Nature

Dozens of papers co-authored by Nobel laureate raise concerns

Images showing the results of experiments in molecular-biology research papers are often scrutinized on websites such as PubPeer. He published his Nobel-prizewinning work in the 1990s; the latest concerns focus on related molecular-biology research published since. Journals had issued one retraction in 2011 and corrections in 2013 to two papers Semenza co-authored, but the rest of the editorial notices have appeared in the past two years. And last month, the Proceedings of the National Academy of Sciences USA retracted four cell biology papers co-authored by Semenza and corrected three others. (Several other researchers in the field contacted by Nature’s news team declined to discuss the irregularities in papers co-authored by Semenza.)

5 months ago Nature

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