Tending the microbiome: is being indoors and sanitising everything making us more sick?
Experts call for increased ventilation and the reintroduction of 'good germs' to make people healthier and more and productive
Travellers at Kings Cross St Pancras train station queue to board trains to Paris in London, Britain. EPA
A commuter at Kings Cross train station in London, Britain. France has become the latest country to ban air and rail travel from the UK following news of the new variant Covid-19 that has spread rapidly across London and south-east England. EPA
Festive lights hang over an otherwise quiet Carnaby Street in London, England. London and large parts of southern England were moved into a newly created Tier 4 lockdown, closing non-essential shops and limiting household mixing. Getty Images