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Were wearing masks. Were social distancing. Were avoiding large gatherings, especially inside. At least, most of us are. As officials endeavor to underline the importance of these and other measures in containing the coronavirus pandemic, how can we tell if our collective efforts are working?
Cases per 100k, positivity rate, hospital admittance and deaths are some of the commonly tracked stats. Health experts around the globe have varying interpretations of each one, and they mean different things amid different conditions.
Theres one more metric, and it focuses specifically on the rate of viral spread.
Referred to as R, it estimates how fast or slow the pathogen that causes COVID-19 is propagating among a community. In broad strokes, R can be thought of as measuring how many other people each infected person will go on to infect. Keeping this number down is what contact tracing aims to accomplish.
A variety of sites have popped up where you can track this curve for various nations or different U.S. states, but there werent any showing R for Philadelphia alone until now.
The chart above is calculated using data from the Harvard Chan School of Public Health. It will stay updated on this page as researchers refresh their information online; this happens multiple times each week. Each point shows a 7-day average for a smoother approximation of trends.
Popularized by German Chancellor Angela Merkel in a viral video back in April, the statistic is complicated, and is less useful for predicting the future than for taking an assessment of current and past conditions.
The number epidemiologists call R provides a base-level approximation of how fast cases reproduce within any specific community, and it varies according to herd immunity and other factors. R whats shown in the graph above is what researchers call the statistic as it evolves over time during an active epidemic.
If R = 1, each positive case is causing one other case. Not great, but not horrible. Horrible is when R is greater than 1, because that means an infection is spreading exponentially exactly what happens to cause an epidemic, or in the case of COVID-19, a global pandemic. When R is less than 1, it means the infection is being contained.
If youre interested in a longer explanation, science journal Nature has a good piece on this here.
The Philadelphia Department of Public Health created a new division to build a contact tracing program, which Health Commissioner Dr. Tom Farley has called even more important as case counts go down.
As of late July, the city had hired about 110 people to work on the project, including interviewers, tracers and supervisors.
The group is ethnically diverse: 57% are African American, 25% are Caucasian, 6% are Latino/Latina and 11% are Asian, per Farley. Theres an entire Spanish-speaking team, and a quarter of the staff speaks two languages; a sixth were born outside the U.S.
Staffers were recruited from local communities with help from neighborhood associations, because trust is paramount in the job. These folks have to convince random strangers some of whom may know they were in contact with a COVID carrier, many of whom do not that a) its not a spam robocall and b) people should discuss their personal habits and specific whereabouts.
Privacy is a huge part of the training, and Farley said data is never shared outside the health department, not with law enforcement or anyone else.
Still, about a third of people called by Phillys contact tracers are not answering the phone or providing any information about their contacts. If you or anyone you know sees a call from 215-218-XXXX, pick up. It can help keep R down and get the city closer to full reopening.
See more here:
- How We'll Know When The COVID-19 Crisis Is Over - NPR - July 12th, 2021
- Lambda Variant Of Covid-19 Coronavirus Is Spreading, What You Need To Know - Forbes - July 12th, 2021
- New Zealand, where Covid-19 is dormant, fights another respiratory virus, and other news from around the world. - The New York Times - July 12th, 2021
- Bat Scientists Warn That the World May Never Know Covid-19 Origins - The Wall Street Journal - July 12th, 2021
- FLORIDA Florida reports rise in coronavirus cases over the past week WINK NEWS - Wink News - July 12th, 2021
- Breath-Based Coronavirus Tests Are Being Developed - The New York Times - July 12th, 2021
- Fauci says there should be more coronavirus vaccine mandates at the local level - Anchorage Daily News - July 12th, 2021
- South Africa extends tight COVID-19 restrictions for another 14 days - Reuters - July 12th, 2021
- COVID-19: What you need to know about the coronavirus pandemic on 9 July - World Economic Forum - July 12th, 2021
- Coronavirus cases in the Netherlands surge more than 800% in one week - BNO News - July 12th, 2021
- Over three-quarters of Britons re-evaluate their lives during Covid - The Guardian - July 12th, 2021
- COVID outbreaks: Where are the worst COVID-19 surges in the world? - Deseret News - July 12th, 2021
- Israel offers third shot of Pfizer COVID-19 vaccine to adults at risk - Reuters - July 12th, 2021
- Americans will need masks indoors as U.S. heads for 'dangerous fall' with surge in delta Covid cases - CNBC - July 12th, 2021
- Rob Schneiders Tweets About Covid-19 Vaccines Got These Responses - Forbes - July 12th, 2021
- Coronavirus Briefing: What Happened Today - The New York Times - April 20th, 2021
- 173 infected in new coronavirus outbreaks at 41 schools, says Michigans April 19 school outbreak report - mlive.com - April 20th, 2021
- Coronavirus in Michigan: Heres what to know April 18, 2021 - WDIV ClickOnDetroit - April 20th, 2021
- Heres what it would take to cut Ohios coronavirus cases in half - cleveland.com - April 20th, 2021
- U.K. Coronavirus Strain Does Not Lead To More Severe Illness And Death, Study Finds - NPR - April 20th, 2021
- Coronavirus cases trend down in Ohio after weeks of increases; hospitalizations still up - latest trends and - cleveland.com - April 20th, 2021
- Florida mother and nurse finally leaves hospital after 111 days fighting coronavirus - FOX 35 Orlando - April 20th, 2021
- What the Coronavirus Variants Mean for Testing - The New York Times - April 20th, 2021
- How the Coronavirus Variants Are Spreading in New York City - The New York Times - April 20th, 2021
- Cleveland Indians trending toward 85% vaccination rate for coronavirus - cleveland.com - April 20th, 2021
- Covenant Health closes all drive-thru coronavirus testing sites - KLBK | KAMC | EverythingLubbock.com - April 20th, 2021
- Four Astros on COVID-19 list tentatively set to rejoin team - Houston Chronicle - April 20th, 2021
- No, Having Raw Onions And Salt Cannot Cure Coronavirus - The Quint - April 20th, 2021
- COVID-19 in South Dakota: 133 total new cases; Death toll remains at 1,953; Active cases at 2,153 - KELOLAND.com - April 20th, 2021
- Covid updates: U.S. cases and hospitalizations drop; Mexico close to approving Russian vaccine - CNBC - February 4th, 2021
- One Emergency After Another: Wisconsin Governor And Legislators Battle Over COVID-19 - NPR - February 4th, 2021
- Dr. Fauci On Vaccinations And Biden's 'Refreshing' Approach To COVID-19 - NPR - February 4th, 2021
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- A Year Into The Pandemic, What's Driving Varied Coronavirus Rates Across Wisconsin? - WisContext - February 4th, 2021
- Disinfecting a Car to Protect Against Germs, Coronavirus - Healthline - February 4th, 2021
- Why same 84 Ohio counties are on coronavirus red alert again this week, though orange counties arent at bott - cleveland.com - February 4th, 2021
- The shift from nought to hedonism overnight was too much for this lockdown zombie - Evening Standard - December 17th, 2020
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- Government take heed: Some goals are best achieved indirectly - The Daily Telegram - December 17th, 2020
- Blind Evolution Explained Everything - Discovery Institute - December 17th, 2020
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- The Weekend Edit: Party Like It's 2021! - The Handbook - December 17th, 2020
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- Leeds pubs and bars react as Tier 3 rule remains meaning they can't open to customers at Christmas - Yorkshire Evening Post - December 17th, 2020
- My Favorite Fiction of 2020 - The New Yorker - December 17th, 2020
- BRIAN JOSEPH: On the joy and importance of small pleasures during COVID - TheChronicleHerald.ca - December 17th, 2020
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- Suszynski: Knowing through imagination | VailDaily.com - Vail Daily News - December 5th, 2020
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- Trump Embraces Fringe Theories on Protests and the Coronavirus - The New York Times - August 31st, 2020
- Governor Cuomo Announces New Record High Number of COVID-19 Tests Reported to New York State - ny.gov - August 31st, 2020
- How Italy's 'father of the swabs' fought the coronavirus - Science Magazine - August 31st, 2020
- Alaska coronavirus Q&A: How are people here getting COVID-19? And what's the deal with testing numbers? - Anchorage Daily News - August 31st, 2020
- Coronavirus news of the week (VIDEO) - Live Science - August 31st, 2020
- A case of coronavirus reinfection shows the complexities of the pandemic - The Verge - August 31st, 2020
- New drool-based tests are replacing the dreaded coronavirus nasal swab - Science Magazine - August 31st, 2020
- How Minnesota's biggest beef producer is weathering the coronavirus - Minneapolis Star Tribune - August 31st, 2020
- When the Threat of Eviction Meets the Threat of Coronavirus - The New York Times - August 31st, 2020
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- This Trawlers Haul: Evidence That Antibodies Block the Coronavirus - The New York Times - August 20th, 2020
- NIH imposes 'outrageous' conditions on resuming coronavirus grant targeted by Trump - Science Magazine - August 20th, 2020