Over 60 firms in Britain took part in the six-month experiment allowing almost 3,000 employees to work one day less per week while retaining the same salary.

So far, around 35 million updated boosters have been administered across the US, representing around 10% of the total population, as per government data.

Women are more likely to have long Covid than men, according to the study, with 9.4% of US adult women reporting long Covid symptoms compared to 5.5% of men.

The vaccine, BBIBP-CorV, is one of the two Sinopharm Covid shots approved for use in China, and is also the main shot that the state-owned firm has exported.

Researchers at King's College London found the odds of developing long Covid after infection were 20% to 50% lower during the Omicron wave in the UK compared to Delta.

The study found that peak Covid-19 hospitalisation rates among children in the age group were higher during the Omicron wave than when Delta was the predominant variant.

The second booster's protection against infection dwindled after four weeks, Israeli researchers say.

Even in mild cases, participants in the research showed 'a worsening of executive function' responsible for focus and organising, and on an average brain sizes shrank between 0.2% and 2%.

However, a paediatric infectious disease expert says it's not surprising that protection against mild illness would wane and that the goal of the vaccine is to protect against severe illness.