MultiMaskers — Benefits of Wearing 2+ Masks

For maximal protection (Gandhi & Marr, 2020)

2 Masks at the same time → (1) wear a cloth mask tightly on top of a surgical mask where the surgical mask acts as a filter and the cloth mask provides an additional layer of filtration while improving the fit.

By, Multimasking can protect individuals from COVID19 acquisition by further reducing inhalation of viral particles by the mask wearer. Moreover,

“multiple layers of fabric have been found to substantially increase the filtration efficiency of mask materials (Drewnick et al., 2020; Zangmeister et al., 2020), with the first layer reducing the velocity of the droplets and increasing the ability of the second layer to filter the droplets” (Aydin et al., 2020)

If the masks fit well, these combinations should produce an overall efficiency of >90% for particles 1 mm & larger, which corresponds to the size of respiratory aerosols that we think are most important in mediating transmission of COVID19” (Pan et al., 2020).

if someone becomes infected while wearing a mask, they are more likely to have a milder or asymptomatic infection than someone who becomes infected while not wearing a mask (Gandhi & Marr, 2020)

Caveats → successful multimasking requires avoiding any of the following outlandish/ unrealistic/ unlikely to ever happen behaviors:
- wearing a secondary mask with strings that aren’t long enough to fit over the primary
- playing with the strings (some article actually mentioned this… it’s like they have to create/ make-up issues with multimasking)
- “Dr. S. Patrick Kachur, a professor at the Columbia University Mailman School of Public Health in New York City, said that some combinations, such as a mask and a neck gaiter, could be more effective than the singular gaiter, since some gaiters are just one layer of fabric. If you’re layering two masks you should make sure you have enough to rotate them in and out and wash them regularly,” Kachur added.”



Failing to wear the mask properly will result in a reduction in efficiency (Dbouk & Drikakis, 2020). This is because…

Beyond 6 Feet (Verma et al., 2020)

The pathogen responsible for COVID19 is found primarily in respiratory droplets that are expelled by infected individuals during coughing, sneezing, talking, and breathing10–15. SARS-CoV-2 is spread through the presence of infectious SARS-CoV-2 virions in respiratory aerosols/droplets emitted from an infected individual & depositing in the respiratory tract of a susceptible individual (Lednicky et al., 2020; Santarpia et al., 2020). Coughs and sneezes result in violent, episodic pu releases (Bourouiba et al., 2020) while speaking and singing result in a pu train that may be well approximated as a continuous turbulent jet (Asadi et al., 2019; Abkarian et al., 20202).

1 →The smallest droplets can remain suspended in the air for hours after the infected individual has left the area, potentially infecting unsuspecting individuals who come into contact with them

2 → They can penetrate deep into the airways of individuals who breathe them in, which increases the likelihood of infection even for low pathogen loads.

Droplet dispersal of uncovered coughs were able to travel noticeably farther than the currently recommended 6-foot distancing guideline.

Verma et al,. 2020 Results:

COVID & Cute Kittens

14. Hök K. Demonstration of feline infectious peritonitis virus in conjunctival epithelial cells from cats. APMIS 1989; 97: 820–824.



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Dr. Jarryd Willis PhD

Dr. Jarryd Willis PhD

I'm passionate about making a tangible difference in the lives of others, & that's something I have the opportunity to do a professor & researcher.