‘Distancing isn’t helping you’: Indoor COVID-19 exposure risk same at 6, 60 feet, MIT researcher says

Gabrielle Masson – Friday, April 23rd, 2021

People who maintain 60 feet of distance from others indoors are no more protected than if they socially distanced by 6 feet, according to a peer-reviewed study published April 27 in the Proceedings of the National Academy of Science of the United States of America.

Cambridge-based Massachusetts Institute of Technology professors Martin Bazant and John Bush, PhD, developed a model to calculate indoor exposure risk to COVID-19 by factoring in the amount of time spent inside, air filtration and circulation, immunization, variant strains, mask use, and respiratory activity such as breathing, eating or talking.  

“We argue there really isn’t much of a benefit to the six-foot rule, especially when people are wearing masks,” Mr. Bazant told CNBC. “It really has no physical basis because the air a person is breathing while wearing a mask tends to rise and comes down elsewhere in the room so you’re more exposed to the average background than you are to a person at a distance.”

As with smoking, even people wearing masks can be affected by secondhand smoke that makes its way around the enclosed area and lingers. The same logic applies to airborne droplets of the virus, according to the study. However, the study did note that mask use by both infected and susceptible people reduces “respiratory plumes” and thus increases the amount of time people may safely spend together indoors. 

When crafting guidelines, the CDC and World Health Organization have overlooked the amount of time spent indoors, Mr. Bazant claims.  

“What our analysis continues to show is that many spaces that have been shut down in fact don’t need to be,” Mr. Bazant said. “Oftentimes, the space is large enough, the ventilation is good enough, the amount of time people spend together is such that those spaces can be safely operated even at full capacity, and the scientific support for reduced capacity in those spaces is really not very good.”  

Opening windows or installing new fans to keep air moving may be just as effective or more effective than purchasing a new filtration system, Mr. Bazant said.

The CDC currently recommends staying at least 6 feet away from other people and wearing a mask to slow the spread of COVID-19, citing the fact that the virus spreads mainly among people who are in close contact for a prolonged period.  

“The distancing isn’t helping you that much and it’s also giving you a false sense of security, because you’re as safe at six feet as you are at 60 feet if you’re indoors. Everyone in that space is at roughly the same risk, actually,” Mr. Bazant said. 

After three rounds of peer review, Mr. Bazant says he hopes the study will influence social distancing policies.

Source –


Greystone & IVP Work Together to Deliver Indoor Biodefense Clean Air Technology to Senior Living Communities Across the Country

Irving, TX (April 7, 2021) – Greystone, a recognized leader in senior living consulting for nearly 40 years, is the first U.S. senior care consultant to begin working with the IVP Biodefense Indoor Air SystemTM –  the only existing indoor air defense that can instantaneously catch and kill airborne COVID-19 (99.999%), other RNA viruses, and anthrax spores (99.98%) in a single pass.  IVP’s core technology is a specialized heated filtration system which meets ASHRAE standards and has been granted emergency use authorization by the FDA during the COVID-19 pandemic. The alliance will promote IVP’s technology for protection of one of the country’s most vulnerable populations: senior citizens.

Nearly 8 in 10 deaths have been among people 65 and older, according to the latest demographic data available from the Centers for Disease Control and Prevention (CDC). Greystone will help lead the way. Having advised more than 500 owners working on more than 125 community start-ups and developments, and having managed more than 50 communities, Greystone will begin offering this new technology as an option to their clients.

“The pandemic took an enormously cruel toll on seniors and healthcare providers,” said John Spooner, Greystone Co-CEO. “This technology will play a vital role in safely restoring normal operations and allow us to honor our promise of high-quality care for our residents.”

The plan is to suggest the use of IVP units in Greystone-managed communities and on campuses where Greystone is the consultant, with an emphasis on areas of the country that were heavily impacted by COVID-19, such as the Northeast.

“IVP is helping people breathe with confidence using proven solutions that raise the quality of indoor air,” said Dr. Garrett Peel, IVP co-founder. “Senior living and health care environments simply require the highest quality indoor air we can provide to fully emerge from this public health crisis.”

To further advance the expansion of the IVP technology, public health expert Kenneth Thorpe, executive director of the Emory University Institute for Advanced Policy Solutions, initiated meetings with President Joe Biden’s team toward the end of last year.

“The filter is revolutionary,” says Thorpe, also a professor of public health. “It has economic importance and will have an impact on morbidity and mortality.”

This revolutionary technology will definitely play a part in keeping our most vulnerable populations safe throughout this pandemic, and further secure them from future outbreaks. The technology forces air through a heated filter that captures and kills contaminants, with sub-second destruction of biological viruses in a single pass, without changing the ambient air temperature significantly.  IVP has been endorsed by the American Society of Mechanical Engineers as one of five top technologies in the world to combat COVID-19.

Inventor Monzer Hourani was recently named a top 25 Newsmaker of the Year by the Engineering News Record.   The prestigious Award of Excellence winner will be announced April 8th at the ENR virtual conference. 

“This technology doesn’t just remove or neutralize COVID-19 like others claim,” Hourani said. “We actually kill it. We’re the only indoor biodefense technology proven to catch and kill SARS-CoV-2, the virus that causes COVID-19 (99.999%), and do it in a single pass.”

Hourani is not shy about the science behind IVP and what sets it apart from others in the industry. Senior living communities are now going to benefit from this newly formed alliance that will bring viral-free air to our most at-risk family members.

About Integrated Viral Protection (IVP)

Integrated Viral Protection Solutions, LP (IVP) was created by Monzer Hourani in April 2020, to respond to the COVID-19 global pandemic and to foster research, development, and deployment of technologies that offer biodefense solutions to mitigate transmission of biological threats in indoor environments. At the heart of this award-winning biodefense design is a proprietary heated mesh that works in conjunction with legacy air filtration found in HVAC systems. The resulting suite of products will offer proven in-line destruction for the airborne transmission of COVID-19 indoors. This technology has been recognized by the American Society of Mechanical Engineers as a top innovation of 2020 for fighting COVID-19, and Hourani is recognized by Engineering News-Record as a top newsmaker.

The Biodefense Indoor Air Protection System is first line prevention technology against environmentally (airborne) mediated transmission of SARS-CoV-2 (COVID-19). The heated biodefense filter can be retrofitted into commercial and home HVAC systems and/or deployed as a mobile unit equipped with powerful filtration capability. For more information, please visit

For IVP contact:

Lauren Velasco,; 847-567-4322

About Greystone

For nearly four decades, Greystone has been a trusted adviser in senior living, serving 500+ organizations in strategic and project planning, business enhancement and repositioning, financial advisory, development, marketing, and management. Their mission is to enhance the lives of seniors through a “continuum of living” and create clear paths for their clients to excel.

For Greystone contact:

Emily Klaus,; 972-402-3715

Source –