Leaving middle seats open could provide airline passengers more protection from the novel coronavirus that causes COVID-19, a laboratory modelling study has found.
The researchers, including those from U.S. Centers for Disease Control and Prevention (CDC), noted that aircraft can hold large number of people in close proximity for long periods, which are conditions that can increase the risk for transmitting infectious diseases.
Based on laboratory modelling of exposure to SARS-CoV-2 on single-aisle and twin-aisle aircraft, exposures in scenarios in which the middle seat was vacant were reduced by 23 per cent to 57 per cent, compared with full aircraft occupancy, the researchers noted.
Lately, airlines have abandoned the pandemic practice of blocking seats to maintain physical distancing between the travellers
"Physical distancing of airplane passengers, including through policies such as middle seat vacancy, could provide additional reductions in risk for exposure to SARS-CoV-2 on aircraft," the researchers concluded.
The team of researchers from CDC and Kansas State University (KSU) in the US used a bacteriophage a virus that infects bacteria -- as a surrogate for airborne SARS-CoV-2.
They modelled the relationship between SARS-CoV-2 exposure and aircraft seating proximity, including full occupancy and vacant middle seat occupancy scenarios.
"Compared with exposures in full occupancy scenarios, relative exposure in vacant middle seat scenarios was reduced by 23 per cent to 57 per cent depending upon the modelling approach, the researchers said.
A 23 per cent exposure reduction was observed for a single passenger who was in the same row and two seats away from the SARS-COV-2 source, rather than in an adjacent middle seat, they said.
When quantifying exposure reduction to a full 120-passenger cabin rather than to a single person, the study predicted exposure reductions ranging from 35 per cent to 39.4 per cent.
A 57 per cent exposure reduction was observed under the vacant middle seat condition in a scenario involving a three-row section that contained a mix of SARS-CoV-2 sources and other passengers, according to the researchers.
Based on this laboratory model, a vacant middle seat reduces risk for exposure to SARS-CoV-2 from nearby passengers, they said.
Last year, a Harvard study, paid for in part by the US airline industry, claimed that the ventilation on planes, together with other measures, reduces the possibility of greater exposure to COVID-19.
The researchers acknowledge some limitations in the CDC study, including the fact that data were collected under higher relative humidity conditions in the laboratory than would be present during flight.
Droplet evaporation into aerosol is more rapid under lower relative humidity, they said.
Because aerosols travel farther than droplets, the current study might underpredict the aerosol spread in an actual cabin environment, according to the researchers.
(Only the headline and picture of this report may have been reworked by the Business Standard staff; the rest of the content is auto-generated from a syndicated feed.)
Dear Reader,
Business Standard has always strived hard to provide up-to-date information and commentary on developments that are of interest to you and have wider political and economic implications for the country and the world. Your encouragement and constant feedback on how to improve our offering have only made our resolve and commitment to these ideals stronger. Even during these difficult times arising out of Covid-19, we continue to remain committed to keeping you informed and updated with credible news, authoritative views and incisive commentary on topical issues of relevance.
We, however, have a request.
As we battle the economic impact of the pandemic, we need your support even more, so that we can continue to offer you more quality content. Our subscription model has seen an encouraging response from many of you, who have subscribed to our online content. More subscription to our online content can only help us achieve the goals of offering you even better and more relevant content. We believe in free, fair and credible journalism. Your support through more subscriptions can help us practise the journalism to which we are committed.
Support quality journalism and subscribe to Business Standard.
Digital Editor
RECOMMENDED FOR YOU