SMC Spain

In an interview with US television FOX News, FBI Director Christopher Wray said that, according to his office's assessment, "it is likely that the origin of the coronavirus pandemic was a leak from a laboratory in Wuhan, China". These statements follow media reports of a US Department of Energy report, accessed by the Wall Street Journal, that would also support "with low confidence" the leak hypothesis. Even so, a spokesman for the US National Security Council told AP that there is "no consensus" among intelligence agencies on the issue.

US scientists have found perfluoroalkylated and polyfluoroalkylated substances (PFASs) in sewage sludge from toilet paper waste. The research, published in the journal Environmental Science & Technology Letters, analysed the presence of these persistent and potentially harmful compounds in toilet paper rolls sold in North, South and Central America, Africa and Western Europe. These substances were compared with those detected in samples of sewage sludge from sewage treatment plants in the United States.

A study has associated the consumption of the sweetener erythritol with an increased risk of cardiovascular disease, specifically myocardial infarction and stroke. The data are published in the journal Nature Medicine.

A journalistic investigation by BMJ reporter Jennifer Block finds that more and more children and adolescents identify as transgender and are offered medical treatment, in particular in the United States. The reporter analyses scientific evidence showing this increase in the number of treatments, as well as the guidelines of US medical bodies. She also interviews experts from different countries, laying out the controversy among professionals about the scientific evidence used to make decisions about the initiation of treatment.   

A Swedish research team has successfully 'grown' a soft, electrically conductive polymer in various zebrafish and leech tissues, as well as in isolated mammalian muscle tissues, without damaging those tissues. The research is published in Science.

Analysis of the two asymptomatic cases of H5N1 avian influenza detected in Spain in autumn 2022 in workers at a poultry farm in Guadalajara has confirmed the theory that no actual infections occurred, but that both were in contact with genetic material of the virus found in the environment. Spain has recently modified its protocols, according to the analysis published in Eurosurveillance.

A study published in Nature suggests that carbon sequestration is at risk of destabilising in large regions of the planet. In some areas, this sequestration - the difference between the CO₂ captured and released by ecosystems into the atmosphere - has varied greatly in recent years. The research is led by CREAF and the University of Antwerp (Belgium).

A study carried out by researchers at the University of Amsterdam Medical Centres on more than 220,000 children examines the academic performance at age 12 of children born by induced labour. According to the authors, a reduction in scores was observed in infants born after induced labour between 37 and 41 weeks. The research is published in Acta Obstetricia et Gynecologica Scandinavica.

On Tuesday, Russian President Vladimir Putin announced that he is suspending Russia's participation in the New START treaty, a bilateral agreement signed with the United States that has been in force since 2011 and that limits and controls the nuclear armament of both powers.