COVID19 COVID-19 - Stats, Calculators, Guides, Useful Info & Articles

This page contains links to COVID-19 statistics, calculators, useful information and more than 600 articles that I have written summarizing scientific publications about COVID-19 in language that is hopefully easier to understand for the general public.

Statistics:

Calculators:

The calculators are available as a Google Sheet in read-only mode. To update the values inside the spreadsheet, simple make a copy by clicking on "File" and then "Make a copy" after which you can edit the document as much as you want.

  1. Calculate the Amount of Shared Air in an Indoor Space using CO2 Levels = Google Sheet
  2. Calculate the Harmonic Mean Overall Mask Fit Factor = Google Sheet
  3. Calculate the Equivalent Exposure Time Calculator (Real-World Impact of Various Mask Fit Factors) = Google Sheet
  4. Calculate the Probability that 1 Person (or more) is Infected in Group of Size n = Google Sheet

Guides & Useful information:

* How COVID-19 is spread through the air: Infographics & Video * COVID-19 Portal (Online self-assessment tool & test results): Ontario
* Understanding airborne transmission of respiratory viruses: Science Journal * Long/Post COVID-19 Task Force Reports: Canada
* ASHRAE Standard 241, Control of Infectious Aerosols: ASHRAE [Free Preview]
* Explainer posts for ASHRAE 241: Joey Fox
* Fire Smoke forecasts: Canada & USA
* Ontario Outdoor Pollutant Concentrations: Various Cities
* School Indoor Air Quality Fact Sheets: ASHRAE
* OSPE Indoor Air Quality (IAQ) Advisory Group guidance: OSPE
* Source of CO2/Air Quality monitors in Canada: EBSECan & CO2.click
* Guide for Air and Other Travel: WHN:Plane/Train/Cars & Flying & Hotel * How N95 respirators & filters stop such small particles: Video
* Reducing Risk in an Apartment/Hotel: Joey Fox * Need a high-quality mask in Canada but don't have access? Request for free
* A collection of info-graphics & presentation: Olivia Belknap
* Sources of better masks/respirators in Canada:
* Collection of Indoor Air Quality video lessons: UCDAVIS
* Indoor Air Quality - A collection of Introductions: Joey Fox
  • General Introduction
  • Ventilation, CO2 Monitoring, Filtration
  • Upper Room UV, Far UV, UV Light Against Diseases
  • Humidity, Air Distribution
* Guides to Protecting Yourself, Ventilation, Air Quality, CO2 & UV: Joey Fox
* Clean Air While Driving: Joey Fox
* Your Home, COVID and Air Quality (AQ): Joey Fox
* Literature hub (400k+) for tracking up-to-date COVID scientific information: NIH NLM
* Repository of 1400+ categorized COVID research studies: Zotero
* Long COVID Rehabilitation: A Guide for Health Care Professionals: Mount Sinai
* Medium & Long-Term Complications Associated with COVID-19: PandemicPatients

* Variant visualizer (Genomic Sequence Analysis): Mike Honey
* Variant auto updated PDF reports for: Ontario & Canada
* How To: See what variants are circulating in your area: Web & Twitter & Mastodon & Bluesky
* Variants in Canada (emerging variants, fastest growing, over time): Web
* Comparing the differences between two variants: Web
* How to build a Corsi-Rosenthal (CR) box (by Shiven Taneja): Infographics * Why should we care about a virus with a "99.8% survival rate"? Web
* How to build a Mini Corsi-Rosenthal (CR) box (by Shiven Taneja): Infographics * Ontario Stats: Respiratory Virus Tool and Wastewater Data
* How your immune system actually works: Video * Health Risks of Indoor Exposure to Fine Particulate Matter and Practical Mitigation Solutions: Web & Video
* What actually happens when you are sick: Video * Mandating indoor air quality for public buildings: Web & PDF
* Immunology 101 for non-immunologists: Video * Why parents and experts are calling for a clean-air revolution in schools: Web
* Lifecycle of the COVID-19 virus: General Video & Scientific Video * Indoor airborne risk assessment in the context of SARS-CoV-2: WHO
* How COVID-19 mRNA (Pfizer & Moderna) vaccines work inside your body: Video * Visualizing the relative size of particles (viruses to blood to sand): Infographic
* Why respiratory viruses surge in winter time: Virology Journal * Home care for patients with suspected or confirmed COVID-19:  WHO & FAQ

Articles:

Collection of Articles

Most Popular Articles (click to collapse/expand list)        Variants, Testing & Immune System:
        Air Quality and Monitoring:         Respirators and Masks:
        Vaccines:
        Impact and Damage from Infection:

2026 Articles (click to collapse/expand list)         October 2026         September 2026         August 2026         July 2026         June 2026         May 2026         April 2026         March 2026         January 2026
2025 Articles (click to collapse/expand list)         December 2025         October 2025         September 2025         June 2025         February 2025         January 2025
2024 Articles (click to collapse/expand list)         December 2024         November 2024         September 2024         August 2024         May 2024         April 2024         March 2024         February 2024         January 2024
2023 Articles (click to collapse/expand list)         December 2023         November 2023         October 2023         September 2023         August 2023         July 2023         June 2023         May 2023         April 2023         March 2023         February 2023         January 2023
2022 Articles (click to collapse/expand list)         December 2022         November 2022         October 2022         September 2022         August 2022         July 2022         June 2022         May 2022         April 2022         March 2022         February 2022         January 2022

Older Articles (
Facebook Archive)
  1. Table of Contents
  2. Chronological Order (2022)
  3. Chronological Order (2021)
  4. Chronological Order (2020)
  5. Aerosols & Ventilation
  6. Biology
  7. Impact, Risks, & Testing
  8. Schools
  9. Vaccines


Historical Content:

The following links and data are no longer updated and provided for historical purposes.

1. Stats for Canada, Ontario, Global
2. Vaccine Stats for Canada, Ontario, & Quebec
3. Vaccine Effectiveness in Ontario
4. Ontario Self-Isolation Rule Flowcharts



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