Blocking middle seats on airplanes reduces the risk of COVID-19 exposure, according to a study released Wednesday by the Centers for Disease Control and Prevention.
The research, done in conjunction with Kansas State University, found a 23% to 57% reduction in exposure to “viable” virus particles when middle seats are vacant.
The conclusion: “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.”
Airlines have abandoned the pandemic practice of blocking seats to maintain social distance between travelers.
Delta Air Lines is the only U.S. carrier still blocking middle seats in economy, and that practice will end May 1. Southwest stopped blocking seats Dec. 1.
United Airlines CEO Scott Kirby has repeatedly said there is no way to keep passengers 6 feet apart on a plane, and another United executive said last summer that blocking seats is a PR strategy, not a safety strategy.
recent Harvard research, paid for in part by the airline industry, that concluded that the ventilation on planes, together with other measures, reduces the possibility of exposure to COVID-19 to a point where it “effectively counters the proximity travelers are subject to during flights.”
COVID exposure on flights: More common than you think
The bottom line for travelers: Don’t expect airlines to resume blocking seats or, in the case of Delta, to keep blocking them. (The CDC never required social distancing on planes. Airlines started the practice to give travelers confidence to book.)
fallen below 100,000 a year ago and didn’t top a million again until October.
Bookings got a boost earlier this month when the CDC said vaccinated travelers can resume travel at low risk.
The data for the social distancing study were collected before the pandemic began, so the effects of mandatory airline passenger mask use on COVID exposure was not measured.
The CDC suggested that the fact that mannequins in the study weren’t wearing masks does not negate the findings, because the study measured aerosol exposure on the plane and masks are “more effective at reducing fomite and droplet exposures than aerosol (airborne) exposures.”
Slatter, said the fact that COVID exposure was significantly reduced without masks actually buttresses the CDC study’s argument for keeping middle seats open.
“That’s the reality of this: even without the masks they were able to reduce exposure, which is quite impressive,” he said. “Imagine wearing a mask. That would be even more impactful.”
Slatter said the findings, along with continuing COVID cases and the fact that just one quarter of Americans are vaccinated, argue for spreading passengers out on planes until the pandemic is over.
“There’s no question we should keep those middle seats open,” he said.