Implementation of social distancing policies correlates with significant reduction in SARS-CoV-2 transmission


social distance
Credit: Pixabay/CC0 Public Domain

According to researchers from The University of Texas MD Anderson Cancer Center, the implementation of social distancing policies corresponded with significant reductions in transmission of the SARS-CoV-2 virus and reduced community mobility, both in the U.S. and globally, providing evidence that social distancing is a useful tool in preventing further spread of COVID-19.

The study, published today in PLOS ONE, estimates that policies enacted nationally in 46 countries prevented an estimated 1.57 million cases of COVID-19 over a two-week period, representing a 65% reduction in new cases. The researchers suggest these data emphasize the significant benefits that can be achieved by individuals practicing social distancing measures.

“At MD Anderson, we are focused on caring for patients with cancer, and we know that our patients are highly vulnerable to COVID-19,” said senior author Raghu Kalluri, M.D., Ph.D., professor and chair of Cancer Biology. “Therefore, we felt it important to conduct an unbiased analysis of safety measures that could benefit our patients as well as society at large. From our data-driven analysis, it became clear that practicing social distancing can have a huge impact on .”

Impact of social distancing policies in the U.S.

To determine the effectiveness of social distancing policies in the U.S., the researchers analyzed COVID-19 spread across each of the 50 states. Recognizing that many factors contribute to disease spread, they analyzed new cases before and after states enacted social distancing policies.

Three states did not implement such policies, providing an opportunity for comparisons. These were analyzed over similar time periods relative to other states.

“We found that states observed significant reductions in transmission rates following the implementation of social distancing policies, compared to states without such policies,” said lead author Daniel McGrail, Ph.D., postdoctoral fellow in Systems Biology. “In fact, two of the smallest reductions in spread were seen in states without social distancing policies.”

The 47 states with social distancing policies also saw greater reductions in average community mobility compared to states without policies, which measures the movement trends of residents across residential, workplace, retail and other locations. States without social distancing policies also saw decreased mobility, although the change was significantly smaller than states with distancing policies.

Impact of social distancing policies globally

Understanding that the U.S. analysis was limited by a small number of states without social distancing policies, the researchers analyzed the effects of social distancing policies globally. They were able to obtain sufficient data for 46 countries with national social distancing policies, 74 nations without such policies and 14 with regional policies.

Following a similar analysis, the data indicate that significantly greater reductions in transmission were seen in countries after implementing a national social distancing compared to those with regional policies or a matched time frame in countries without policies. No significant difference was observed between countries with regional policies and those without social distancing policies.

Countries with any social distancing policies had significantly reduced community mobility relative to nations without policies, and those with national policies saw greater decreases than countries with regional policies. There was a strong correlation between decreased mobility and decreased transmission of the virus, highlighting the importance of individuals practicing social distancing to effectively prevent transmission of the virus.

“This is clear evidence that social distancing measures can collectively have tremendous impacts on reducing transmission of SARS-CoV-2, and we encourage individuals to practice social distancing to help control spread of infections,” said Kalluri. “We believe these data will provide useful evidence for public health officials and policy makers when considering future measures to reduce the spread of COVID-19 in their communities.”

The authors acknowledge the study is limited by a reliance on direct COVID-19 testing, which may underestimate prevalence. Also, the researchers focused on spread rates following implementation of social distancing policies as an internal control for the numerous additional factors likely contributing to spread rates.

For the analysis, daily case numbers and population data were gathered from the COVID-19 Data Repository by the Center for Systems Science and Engineering at Johns Hopkins University. Information on social distancing policies was obtained from the Aura Vision Global COVID-19 Lockdown Tracker and mobility data were acquired from Google mobility reports. All data for the study was collected on June 5, 2020.


Follow the latest news on the coronavirus (COVID-19) outbreak


More information:
PLOS ONE (2020). DOI: 10.1371/journal.pone.0236619

Citation:
Implementation of social distancing policies correlates with significant reduction in SARS-CoV-2 transmission (2020, July 30)
retrieved 30 July 2020
from https://medicalxpress.com/news/2020-07-social-distancing-policies-significant-reduction.html

This document is subject to copyright. Apart from any fair dealing for the purpose of private study or research, no
part may be reproduced without the written permission. The content is provided for information purposes only.



Related posts:

Say what? Like animals, people perk up their ears to hear
Ein „Gefühl“ für Demenz? - Biermann Medizin
As Trump Praises Plasma, Researchers Struggle to Finish Critical Studies
Nations tighten mask rules, lockdowns as Covid-19 deaths approach 700,000
U.S. task force still advises against carotid artery stenosis screening
Remote weight-loss program optimized to cut costs, maximize results
Probiotics not recommended for most digestive conditions
Does Blood Plasma Work for Covid-19 Patients? No One Knows.
Forest fire near Marseille forces hundreds of evacuations
Schools can reopen safely if precautions in place, Australian study shows
The Benefits of Talking to Strangers
November U.S. election can be held safely, experts contend
Scientists Uncover Biological Signatures of the Worst Covid-19 Cases
Research leads to simplified dosage of HIV medicine for children
Colombian ex-president Uribe detained for alleged witness tampering, he says
F.D.A. Adds More Hand Sanitizers to List of Products to Avoid
Beirut blasts damage UN peacekeeping ship, president calls state of emergency
Many COVID-19 patients given useless antibiotics, study finds
Offers of assistance pour in for Lebanon after deadly Beirut explosions
Forget Spas and Bars. Hotels Tout Housekeeping to Lure Back Travelers.
Defending champ Nadal to skip US Open over coronavirus concerns
Mysterious paralyzing illness in kids is set to return, CDC warns
Novavax's New Covid-19 Vaccine Studies Praised By Scientists
HIIT programs show benefits for those with Down syndrome
Nach den Sommerferien: Zurück in Schule und Kindergarten!
Live Coronavirus Tracker - The New York Times
Once popular former king goes into exile amid scandal
Parasite resistance to antimalarial artemisinin derivatives now affecting Africa
Geriatrische Patienten nach Cochlea-Implantation - Biermann Medizin
France's Charles-de-Gaulle airport enforces Covid-19 testing on arrival
Identification of a new mechanism in the immune system provides knowledge about diseases
Wie sich psychologischer Stress auf Immunzellen auswirkt
Are we 'Waiting for Godot?' A metaphor for COVID-19
Unterschiede in den klinischen Merkmalen nicht adipöser Patienten mit NAFLD
Massive explosion rocks Lebanese capital Beirut
Dear Dr... how our email style reveals much about our personalities
Für Kinder steigt in den Ferien das Unfallrisiko
Researcher seeks safer, more effective leukemia treatment
Schlüsselgen für die Bildung von Herzklappen entdeckt
Macron announces coronavirus bonus for France's homecare workers
Red Onions Linked to Salmonella Outbreak, Officials Say
How we found coronavirus in a cat
MAFLD: Körperliche Fitness ist bedeutsamer als reiner Gewichtsverlust
Coronavirus Live Updates: Fight Over Aid Package Drags On
Insufficient evidence of reduced COVID-19 incidence at high altitudes
Macht eine „Immunthrombose“ das Coronavirus so gefährlich?
Niger marks 60 years of independence from France
Cameroonian migrant killed in Morocco after police find forest encampment
Norway cruise ship passengers with coronavirus reach 43
Studie: Candida-Cluster verursachen in unterschiedlichen Krankenhäusern schwere Infektionen
France facing ‘highly likely’ second wave of Covid-19 in autumn or winter
The reluctant candidate taking on Europe’s ‘last dictator’
France risks losing control of coronavirus: science council
Erstes Medikament gegen Hepatitis D von der Europäischen Kommission zugelassen
Trump’s ‘inexperienced and unqualified’ ambassadors leave US allies aghast
Blood test could diagnose baby brain damage just hours after birth
„Sicherer als ein Flug nach Mallorca“: Vorbereitungen für RESTART-19-Experiment laufen
African American BMi associated with severe COVID-19 and ICU admission
Glücklose „Glückspille“: Fluoxetin bessert funktionelle Fähigkeiten nach Schlaganfall nicht
Latin American virus cases top 5 million
Stranded men rescued from Pacific island after writing SOS in sand
Immunization programs yield high 'return on investment,' saving hundreds of billions of dollars
Millions back under lockdown in Philippines amid surge in virus cases
This 'actions-speak-louder-than-words' student puts public policy studies to work
Norway restricts cruise ship arrivals after Covid-19 outbreak on vessel
Penis microbiota predicts if a man's female partner will develop bacterial vaginosis
Fortschritte beim Bluttest auf Alzheimer
Tackling the bioethics challenges raised by COVID-19
Trial of Algerian journalist and press freedom icon Khaled Drareni starts in Algiers
New York attorney probing Trump and his business over 'criminal conduct'
How COVID-19 changed the way patients responded to a heart attack
Isaias strengthens back to a hurricane forecast to hit Carolinas and East Coast
Dementia on the Retreat in the U.S. and Europe
WHO advance team ends visit to China to probe COVID origin
Doubt cast on wisdom of targeting 'bad' cholesterol to curb heart disease risk
Asthma drug (beta2-agonists) can boost sprint and strength performance in athletes
Israeli jets strike targets in Syria after attempted attack in Golan Heights
Trump says he will only allow TikTok sale if US government gets a cut
2.5% of Italians had COVID-19, far more in the north
Half of low-income communities have no ICU beds
Greater financial integration generally not associated with better healthcare quality
Neue effektive Behandlungsform bei akuter Leukämie
An averted glance gives a glimpse of the mind behind the eyes
Gewissheit in nur 15 Minuten mit graphen-oxidbasiertem Schnelltest zur Infektionserkennung
Child sleep problems associated with impaired academic and psychosocial functioning
COVID-19 oder nicht? Röntgen-Software kann bei der Diagnose unterstützen
Former king Juan Carlos to leave Spain amid probe over financial scandal
Covid-19 Testing Is in Short Supply. Should You Still Get a Test?
Racial discrimination linked to suicide
Neue dermato-onkologische Strategien werden beim ersten digitalen Deutschen Hautkrebskongress vorges...
France halts ratifying extradition treaty with Hong Kong in wake of security law
Scientists Worry About Political Influence Over Coronavirus Vaccine Project
Four-stranded DNA structures found to play role in breast cancer
Schulbeginn: Deutsche Dermatologische Gesellschaft (DDG) empfiehlt Hände desinfizieren statt zu viel...
How the city is adapting to keep visitors safe
Is Telemedicine Here to Stay?
The effects of COVID-19 on emergency visits, hospitalizations
FMT: Präzisere Therapie durch genaueren Blick ins Mikrobiom
Drugmaker Sanofi charged with manslaughter over birth defects
Share Your Medical Bills for Coronavirus

Leave a Reply

Your email address will not be published. Required fields are marked *

Next Post

Group-based smoking cessation help US inmates quit tobacco

Fri Jul 31 , 2020
Credit: CC0 Public Domain Behavioral and nicotine replacement therapies offered together can help people who are incarcerated quit smoking, according to Rutgers researchers. The study published in the American Journal of Men’s Health, found that the combination of group-based tobacco dependence treatment and nicotine replacement therapy was an effective and […]