The Minister of Health, Carolina Darias, announced in an interview on La Sexta that there will be a fourth dose of the covid-19 vaccine "for the entire population".

A study published in Nature identifies a metabolite produced during exercise that can effectively reduce food intake and obesity in mice. It has also been found in humans.

Brain lesions that cause spontaneous remission of tobacco addiction in humans affect a brain circuit common to different addictive behaviours, concludes a study published in Nature Medicine. Understanding this brain network opens the way to new therapies against addiction. 

A survey of emergency professionals in more than 90 countries found symptoms of "worker burnout" in 60% of respondents. These are worrying data, says the president of the European Society of Emergency Medicine (EUSEM), because "two problems converge: high levels of burnout and a shortage of professionals".

Last week, the European Parliament approved a ban on the sale of vehicles with emissions of more than 0 grams of CO₂ per kilometre from 2035 in Europe. In addition, they also voted against an amendment that would allow car manufacturers to buy credits for so-called synthetic fuels. Is this the right measure to accelerate the decarbonisation of the transport sector?

A metagenomic comparison of the infant gut microbiome of industrialised and non-industrialised populations reveals robust differences that researchers say are lifestyle-dependent. The research involved samples from infants of Hadza, a group of modern hunter-gatherers living in Tanzania, and is published in the journal Science.

In a press release published this week, Moderna has shared the first data on its new bivalent adapted vaccine against Omicron.

A study of nearly half a million adults examines the association between total and specific fish intake and melanoma risk.

During confinement, pregnant women suffered more stress than usual among pregnant women, according to a study conducted at Vall d'Hebron Hospital. A new result along the same lines also finds effects on the brain development of the foetus. But the period of neurodevelopment spans childhood and adolescence, so there are many opportunities to favourably influence this process.

Glyphosate is one of the most widely used herbicides in the world. New work published in Science reveals that it significantly impairs the ability of bumblebees to maintain the temperature of their hive, a hitherto unsuspected effect that may lead to the decline of this already endangered species, which is essential for pollination.