Rail

London Tube travel linked to the spread of flu-like illnesses

Posted on December 17, 2018

A new study discovered higher rates of airborne infections in Londoners that have longer Tube journeys through busier terminals. Photo: Transport for London
A new study discovered higher rates of airborne infections in Londoners that have longer Tube journeys through busier terminals. Photo: Transport for London

Despite the "commuter cold" being a widely accepted concept, it’s never been proven that public transport contributes to the spread of airborne infections. Now new research on the London underground commute has proven a link does exist.

The study, published on December 4, 2018 in Environmental Health, will help to inform measures to control the spread of infectious disease.

By comparing Oyster card route information and Public Health England data on flu-like illnesses, Dr. Lara Goscé from the University of Bristol’s Department of Civil Engineering and Dr. Anders Johansson from Bristol’s Department of Engineering Mathematics, discovered higher rates of airborne infections in Londoners that have longer subway journeys through busier terminals.

“Higher rates [of influenza-like cases] can be observed in boroughs served by a small number of underground lines: passengers starting their journey in these boroughs usually have to change lines once or more in crowded junctions such as King’s Cross in order to reach their final destination," Goscé explained.

“On the other hand, lower influenza-like rates are found in boroughs where either the population does not use public transport as the main form of transport to commute to work; or boroughs served by more underground lines, which guarantee faster trips with less stops and contacts with fewer people.”



For instance, one finding highlighted that infection rates in residents of Islington, who often change lines at crowded Kings Cross St. Pancreas, were nearly three times higher than in commuters from Kensington, who mostly take direct trains.

The team hope that their findings will inform Government epidemic policies. “Policy makers, in particular, should address the role potentially played by public transport and crowded events and avoid encouraging the attendance of such environments during epidemics,” said Goscé.

Looking to the future, the group want to draw a clearer map of the spread of cold-like infections in a metropolitan environment, and so plan to combine individual level infection data with existing studies from households and schools.


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