https://xitter.cf/t.co/3HTQ0d3M5J is a project to quantitatively estimate the COVID risk to you from your ordinary daily activities. Check out our calculator!

Joined August 2020
microCOVID blog: Deep dive on vaccine efficacy vs Delta variant, ongoing risk of "long COVID" symptoms, and what precautions we think make sense now. microcovid.org/blog/delta
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Calculator updated for the Delta variant! Infection risk up more than 2x ⚠️even if you're vaccinated⚠️ Please visit microcovid.org to get updated risk for your current activities. Blog post coming soon w details about Delta and vaccines + long COVID and other risks.
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The calculator and Risk Tracker now include support for Johnson & Johnson's vaccine. Pfizer & Moderna's effectiveness have been updated. Waiting time between receiving a dose and getting the benefits from it increased to 14 days. Learn more here: microcovid.org/paper/13-q-an…
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And for anyone using Risk Tracker v2.2 or higher, the new vaccine numbers are automatically imported from the website, so there's no need to upgrade! You have them automatically. :)
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Vaccines Update! 💉 We just released v2.2.1 of the Risk Tracker. It can now help you calculate your microCOVID score if you're vaccinated AND the score of seeing someone else who has been vaccinated. Get the latest copy here: microcovid.org/tracker
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Still using a cloth mask? Upgrade to a sealed N95! Better protection for yourself AND others! Explore the new numbers at microcovid.org/. How much better would your protection be? Read microcovid.org/blog/masks for what to buy!
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Muchas gracias a todo los traductores que han trabajado con el proyecto! Ahora tenemos una traducción al español, así como a otros cinco idiomas. microcovid.org/?lng=es cc @esp_covid19 @jljcolorado
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microCOVID project retweeted
9/ …being near 1 person to 4 raises chance of transmission a lot. This is all nicely shown by my fave “How Risky Is a Given Activity?” calculator: @microcovid. Plugging in this scenario (in SF, inside, 15 minutes, 1 other person, masks, 6ft apart), it shows a transmission risk…
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In light of data about the new COVID-19 variant, B117, we have increased activity risks by 50%. The largest effect is yet to come: we expect the virus to become even more prevalent, increasing continually month after month. More on our blog! microcovid.org/blog/b117 1/
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If there is anything you need to do in the next few months that exposes you to some risk (medical procedures, dentist, etc.) consider doing so now. Public-facing activities will incur more microcovids against your budget in February than they do today, and yet more in March. 2/
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🧐 how many microcovids is it to leap tall buildings in a single bound? (probably none, if you are alone and outdoors!)
Two min ago in dream-space I was in Hong Kong searching for the perfect dumpling steamer, jumping from one skyscraper to another in a single leap After a day of shopping I sat on the sidewalk, did a detailed calculation of how many microcovids I’d accumulated, and woke up
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microCOVID project retweeted
Replying to @briankoppelman
The thing people don't account for enough is the rate of COVID spread in their area. Indoor tennis with one person is gonna be relatively dangerous in North Dakota, but relatively safe in NYC (for now, but monitor as caseloads rise). microcovid.org/?distance=ten…
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The first step in protecting your family and community is to avoid getting COVID yourself 👨‍👧 Knowing your risk is crucial to keeping other people safe! As Rachel @Maddow emphasized today: protecting your loved ones starts with your choices about your own risk.
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Maddow: Don't get this thing. Do whatever you can to keep from getting it. Rachel Maddow reveals that her partner, Susan, tested positive for Covid-19 and is still recovering, and implores viewers to consider their loved ones when they calculate their own Covid-19 risk.
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New blog post about Thanksgiving plans! Ben from our team walks you through the precautions his family considered, and how they used the microcovid calculator to understand their options. Ben’s family used this information to decide whether to cancel. microcovid.org/blog/thanksgi…
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microCOVID project retweeted
Replying to @microcovid
The key takeaway here is to quarantine for 7 days after any exposures, and *then* get a test. At that point you’re likely to have detectable virus if you’re infected, and a negative test puts you at the same probability of still being positive as 14d symptom-free without a test.
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PSA: A negative test result does NOT mean you're COVID-free! It means that you don't YET have enough virus in your body to detect. If you were infected right BEFORE the test, the virus might be there, but growing slowly Or you might've caught the virus AFTER you took the test.
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MIT cites Kucircka et al: "during the four days of infection prior to symptom onset, the probability of a false negative on the PCR test went from 100 percent on Day 1 to 67 percent on Day 4 [...] dropping to 20 percent three days after symptom onset." medical.mit.edu/covid-19-upd…
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If you got infected even 5 or more *days* before your test, you may not have enough virus to show up on the test if your incubation period is longer than the median, which is pretty likely! And even then you could be infectious and part of the 20% of false negatives.
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Please, please take care of yourself. This has been a very difficult year, and the upcoming holidays are important to so many people. Being a long distance from people we love is awful. Can I share with you the idea of a risk budget?
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