The H5N1 virus that is causing an unprecedented epidemic among wild and domestic birds has a very low capacity to infect humans. The three cases where infection has been found have been due to close contact with dust raised during the handling of affected poultry.

On 27 September, the National Microbiology Centre detected a positive H5N1 avian influenza in a worker at a poultry farm in Guadalajara (Castilla-La Mancha). The sample was taken on the 23rd and the affected person remained asymptomatic until he tested negative, according to Animal's Health.

The Royal Swedish Academy of Sciences has awarded the Nobel Prize in Physics to Alain Aspect, John F. Clauser and Anton Zeilinger for their experiments with entangled photons, establishing the violation of Bell's inequalities and becoming pioneers in quantum information science.

The National Microbiology Centre has confirmed the first positive human case of H5N1 avian influenza detected in Spain, Animal's Health said yesterday. This is the worker of a poultry farm located in the province of Guadalajara who remained asymptomatic and isolated until he tested negative. This is the second case detected in Europe after the UK declared its case in January this year.

The Karolinska Institute has awarded the Nobel Prize in Medicine or Physiology to Swedish biologist Svante Pääbo, a specialist in evolutionary genetics, for his discoveries on the genomes of extinct hominids and human evolution.

The European Medicines Agency (EMA) safety committee (PRAC) has recommended a change to the information on codeine-ibuprofen combination medicines to include "a warning about serious harm, including death, especially when taken for prolonged periods at higher than recommended doses". The PRAC reviewed several cases of renal, gastrointestinal and metabolic toxicity that had been reported in association with cases of abuse and dependence on these drugs.

Research among more than 7,000 US adults shows small changes in extraversion, agreeableness, openness to change and conscientiousness between the period before the covid-19 pandemic and the year 2022, especially in younger people. The study is published in PLOS ONE.

A study published in the journal PLOS ONE has found an association between paracetamol consumption during pregnancy and attention and sleep problems in these children at three years of age.

The alarming shortage of nurses in all of Spain's autonomous communities drastically compromises the health of the public. This is one of the main conclusions of the new report on nursing ratios in Spain published by the General Nursing Council, which also analyses the situation in relation to other European countries.

Red kites (Milvus milvus) born during a period of drought are disadvantaged throughout their lives, according to a study of a population of red kites in the Doñana National Park. The research is published in Nature Communications.