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June 14, 2021, 9:47 a.m. EDT

How 6 feet became 3: Meet an ER doctor behind the research showing kids are still safe in school with new social-distancing standard

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Jaimy Lee

It turns out that children who attend schools with mask requirements are likely just as safe from COVID-19 sitting just 3 feet from each other and not the 6 feet previously recommended by the Centers for Disease and Prevention.

Those findings, which were used by the CDC to update its guidance about schools in mid-March, stem from a study conducted over the fall and winter examining transmission rates in K-12 schools in Massachusetts, where masks are required for most public-school students and all staff.

Putting students closer together in classrooms did not lead to an increase in COVID-19 cases, a group of medical researchers and policy experts concluded in the accepted manuscript published March 10 in the medical journal Clinical Infectious Diseases.

One of the researchers is Dr. Elissa Schechter-Perkins, an emergency-room physician at Boston Medical Center who has done infection control for the ER there during the COVID-19 pandemic.

Back in spring of 2020, we didn’t know a whole lot about COVID-19,” she said in a March 23 interview with MarketWatch. “And based on what we have seen in influenza pandemics, it was thought that closing schools would be essential and effective in preventing the spread of COVID-19.”

But now, as the pandemic has stretched into its second year and the science is still evolving, it looks like the 6-foot rule, which was particularly onerous for classrooms, may not be necessary.

MarketWatch: Has much of the research around distancing in schools so far been anecdotal?

Dr. Elissa Schechter-Perkins: I would say it went beyond anecdotal evidence. There have been multiple studies that are primarily epidemiologic in nature, from around the world and around the U.S., in which students went back at closer distances. [Editor’s note: The World Health Organization recommends 1 meter — about 3 feet — in schools.] There haven’t been large amounts of in-school transmission, and there haven’t been increased cases in school settings compared to the surrounding communities. So there has been a slowly emerging body of literature, saying that our schools are safe, even with fewer than 6 feet of distance between the students.

MarketWatch: How do you think mitigation factors like masking, plexiglass dividers, or open windows affect transmission in schools?

Schechter-Perkins: It’s a really important point. Our study really was not able to tease out which of the mitigation measures other than distancing was not important. I think it’s important to understand that every school in the districts in Massachusetts that were part of our study had a 100% masking mandate for all staff and all students in Grade 2 and above, and the majority of districts had either a masking requirement or masking was strongly encouraged in the younger students as well. [Editor’s note: The Massachusetts Department of Elementary and Secondary Education requires noses and mouths to be covered at all times, except during designated breaks, for staff and students in second grade or older. Kindergartners and first graders were encouraged to wear masks or shields, but it’s not required . ]

Many of the schools, but not all, had multiple other mitigation measures in place, including daily symptom screening. Many of them had other mitigation measures in place, such as ventilation checks and requirements for contact tracing and quarantining for exposed people. Although we can’t say which of the mitigation measures was the most important, our thought is [that if] the bundle of mitigation measures taken in aggregate is sufficient in decreasing the spread of COVID-19, then it becomes safe to decrease the distance between students. We shouldn’t extrapolate our findings to other less controlled environments where those other factors are not in place.

MarketWatch: Now that we have the new CDC guidance for schools, are you planning any follow-up studies?

Schechter-Perkins: It’s going be really important to continue to follow the data, and it’s something that the country has really struggled with over the last year. As new studies come out and new evidence comes out, the guidelines should change, and that’s been a real struggle for the United States population at large to come to terms with. We’re not used to things changing so rapidly, but I would say as schools do open for more in-person learning it is really essential that we continue to see what happens, especially as we know that the new variants are circulating but also vaccination is increasing.

MarketWatch: Do you think it’s a possibility that one day we would see that spacing requirement shrink even further?

Schechter-Perkins: I absolutely would be open to that. I’m very optimistic about where we are right now. We are doing an excellent job vaccinating greater and greater numbers of the population, and I am really hopeful that we can decrease the transmission of COVID-19 in our country to the point that it becomes, instead of widespread, it becomes episodic in our communities. [Editor’s note: About 16% of the U.S. population has been fully vaccinated, as of March 31, according to the CDC.] At that point, we can use other public health measures, such as rapid diagnostic testing, rapid contact tracing, rapid surveillance testing and quarantines — and really tamp down the transmission of COVID-19.

When we start to get to that point, I do think we’ll be able to open up a lot of things with less distancing requirements, and life will look much more like normal. We’re not there yet, but I do you think that that is in the future.

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