Day 1

• Guidance doc: Protecting children from COVID-19 and making schools and childcare safer. (OzSage)

Day 27

• UKHSA publishes new recommendations for COVID-19 infection prevention and control (UK Government)

Day 1

• Understanding Filtration Efficiency Testing and Fit Testing in Filtering Facepiece Respirators (FFRs) (CDC)

Day 31

• Case studies of DIY air cleaners (UC Davis)

Day 30

• Letter to school district about questions, requests regarding school airborne safety (Open Letter)

Day 14

• Document w/ talking points in support of local school mask mandates (@HuffmanLabDU)

Day 28

• Guidance for Operating Youth Camps (CDC)

Day 26

• School Ventilation: A Vital Tool to Reduce COVID-19 Spread (Johns Hopkins Center for Health Security)

Day 16

• Recommendations for the re-opening of dental services: a rapid review of international sources (COVID-19 Dental Services Evidence Review (CoDER) Working Group)

Day 10

• How coronavirus spreads (CDC)

Day 7

• Scientific Brief: SARS-CoV-2 Transmission (CDC)

Day 30

• Coronavirus disease (COVID-19): How is it transmitted? (update) (WHO)

Day 27

• When You’ve Been Fully Vaccinated (CDC)

Day 13

• Single-Zone Simulations Using FaTIMA for Reducing Aerosol Exposure in Educational Spaces (NIST)

Day 5

• ASHRAE Epidemic Task Force Releases Updated Airborne Transmission Guidance (ASHRAE)

• Tell the CDC, Now is the Time to Recognize Covid-19 Aerosol Transmission (National Nurses United)

Day 4

• Better Masks: Options and FAQs (#MasksForAll)

Day 2

• Within-city Variation in Reactive Oxygen Species from Fine Particle Air Pollution and COVID-19 (Stieb et al.)

Day 24

• Ventilation of indoor spaces to stop the spread of coronavirus (COVID-19) (Public Health England)

Day 23

• Mythbusting: Air Quality in Schools (USGBC)

Day 19

• Operational Strategy for K-12 Schools through Phased Prevention (CDC)

Day 1

• • Roadmap to improve and ensure good indoor ventilation in the context of COVID-19 (WHO)

Day 10

• • Improve How Your Mask Protects You (CDC)

  • CDC Petition: Now is the Time to Recognize Covid-19 Aerosol Transmission (@NationalNurses)

Day 2

• • On the importance of improving protection for workers, occupational exposure against aerosol transmission. (AIHA.org)

Day 23

• Australia Open Letter: National action on aerosol transmission of COVID-19 (Health Care Workers Australia )

Day 20

• Online tool calculates risk of COVID-19 transmission in poorly-ventilated spaces (University of Cambridge)

Day 17

• CADR Calculator: Clean Air Delivery Rate in cfm & m3h (Review of Air Purifiers)

Day 4

• • Canada Open Letter: Time for government to take aerosol transmission of COVID-19 seriously

Day 3

• • UK Open Letter: Improve Ventilation of Care Settings & Upgrade Respiratory Personal Protective Equipment

Day 26

• Guide about Affordable CO2 detectors for COVID-19 Prevention (Villanueva et al)

Day 8

• Guidance on ventilation (CDC)

Day 4

• • Simple calculator to estimate CO2 ppm after dry ice ventilation experiment (@HuffmanLabDU)

Day 1

• • Mask use in the context of COVID-19 (WHO)

Day 26

• Interactive calculator for indoor risk (Zeit.de)

Day 22

• SARS-COV-2 AND COVID-19 DATA HUB (@ErinSandersNP)

Day 20

• COVID-19: suggested principles of safer singing (UK Government)

• COVID guidelines (updated 11/20) (CDC)

Day 18

• Evidence summary on activities or settings associated with a higher risk of SARS-CoV-2 transmission (Irish Health Information and Quality Authority)

Day 13

• Third Round of Performing Arts Aerosol Study Produces More Scientific Data for Return to Activities (NFHS)

• FAQs: Portable Air Cleaners (San Francisco Department of Public Health)

Day 11

• Heating, ventilation and air-conditioning systems in the context of COVID-19: first update (European CDC)

Day 10

• Scientific Brief: Community Use of Cloth Masks to Control the Spread of SARS-CoV-2 (CDC)

Day 5

• Citizens of the world calling on the WHO to act (@covidisairborne)

Day 4

• Canada quietly updates COVID-19 guidelines on risk of airborne spread (CBC)

Day 3

• COVID-19: Main modes of transmission (Public health Canada)

Day 30

• Updated guidance on face coverings (CDC)

Day 29

• Operating schools during COVID-19: CDC's Considerations (CDC)

Day 27

• • Aviation Public Health Initiative (APHI) (Harvard School of Public Health, APLI)

Day 14

• THE JOHN SNOW MEMORANDUM

Day 13

• COVID straight-talk: ideas, hacks, info (@lastmileworks)

Day 9

• Frequently Asked Questions about COVID-19 (CDC)

Day 8

• Resources, evidence related to superspreading (StopSuperspreading.com)

Day 28

• • The Role of Bioaerosols and Indoor Ventilation in COVID-19 Transmission (Government of Canada)

Day 15

• Aerosol-Mediated Infectious Disease Risk Assessments (Dr. Lucas Rocha-Megono et al.)

• The SAFEAIRSPACES COVID-19 Aerosol Relative Risk Estimator (Safeairspaces (see acknowl.))

• Music School Protocols at Univ. Denver Lamont School of Music (University of Denver)

Day 12

• COVID-19 Indoor Safety Guideline calculator (MIT)

Day 2

• Mask testing data (interactive website) (Prof. John Volckens + others (CSU))

Day 1

• Various resources (including school guide, airborne risk tool) on covid indoor air quality (CA Dep't of Public Health)

Day 30

• FAQs on Protecting Yourself from COVID-19 Aerosol Transmission (Prof. Jose Jimenez + others)

Day 29

• Webpage summarizing key points to consider for reducing the risks of COVID19 (also Welsh version) (Dr. Huw Waters, Dr. Eilir Hughes)

Day 28

• SOP transition to recovery: A phased transition for dental practices towards the resumption of the full range of dental provision (UK NHS)

Day 21

• Ventilation recommendations for [a school in Pittsburgh] (David Andersen)

Day 13

• Comprehensive overview of masks: how they work, what kind, etc. (Prof. Brent Stephens)

Day 11

• Web-interface model of airborne infection probability (focused on classrooms; built on Jimenez spreadsheet model above) (Prof. Prasad Kasibhatla)

Day 10

• How to choose the best face mask for you (Wirecutter)

Day 9

• Frequently Asked Questions about COVID19 in Classrooms (Dr. Dustin Poppendieck)

Day 6

• • Details on making/testing box fan air cleaner (Jim Rosenthal, CAFS)

  • Interactive tool to measure aerosol infection probability (based on Prof. Jimenez tool above) (National Geographic)

Day 4

• Doc for comment: Summary of the Evidence For and Against the Routes of Transmission of SARS-CoV-2 (Prof. Jose Jimenez)

Day 3

• • Guide to choosing a portable air cleaner for school needs (Allen, Cedeno-Laurent, Miller)

  • How to operate HVAC and other building service systems to prevent the spread of the coronavirus (SARS-CoV-2) disease (COVID-19) in workplaces (REHVA)

Day 26

• Guide to mask wearing (NY Times)

Day 25

• Twitter opinion: Considerations for opening schools/universities (Prof. Richard Corsi (Twitter))

Day 25

• • Guide to reopening schools (Harvard)

  • Guide to school ventilation (Harvard)

  • Airborne transmission spreadsheet model/tool (Prof. Jose Jimenez)

Day 15

• Air cleaners (Prof. Shelly Miller)

Day 6

• Guidance for parks and recreational operators (CDC)

Day 13

• Putting a balance on the aerosolization debate around SARS-CoV-2 (Dancer et al.)

Day 12

• Fate and Transport of Indoor Microbiological Aerosols (FaTIMA) (NIST)