spread

New research supports stricter social and economic mandates to reduce COVID-19 spread

New research supports stricter social and economic mandates to reduce COVID-19 spread

Credit: Pixabay/CC0 Public Domain As more people return to indoor settings for work and school, new research shows stricter policy restrictions on business operations and indoor mask-wearing reduced COVID-19 cases in Ontario during the first and second waves. A new study led by researchers from the University of Waterloo found that stricter non-pharmaceutical interventions, such …

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Study reveals role of globalization and zoonosis in the emergence and spread of SARS-CoV-2 variants

Study reveals role of globalization and zoonosis in the emergence and spread of SARS-CoV-2 variants

The severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), which is the virus responsible for the coronavirus disease 2019 (COVID-19), was originally detected in Wuhan, China in December 2019. SARS-CoV-2 is a rapidly evolving virus with a mutation rate that is about 9.8 x 10-4 substitutions per site per year, along with a high rate of …

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To curb the spread of COVID-19, restrict intercity travel as soon as a lockdown is announced: study

To curb the spread of COVID-19, restrict intercity travel as soon as a lockdown is announced: study

Fig. 1: Phylogenetic analysis of 391 Bangladesh SARS-CoV-2 genomes March–July 2020. a, Maximum-likelihood phylogenetic analysis of 391 viruses sampled from Bangladesh (black) on a background of 68,870 publicly available GISAID global sequences in collapsed clades. Collapsed clades are colored by the predominant region/country that they were sampled in (blue, Europe; red, United States; green, India; …

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Over-the-counter rapid antigen tests can help slow the spread of COVID-19

Over-the-counter rapid antigen tests can help slow the spread of COVID-19

Credit: Unsplash/CC0 Public Domain The rise of the highly transmissible delta variant around the U.S. has increased demand for rapid antigen COVID-19 tests that can be purchased from a pharmacy without a prescription, used at home, school or work and that give results in 15 minutes. On Sept. 9, 2021, the White House announced several …

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Do school fountains spread COVID? Why one district is giving students water bottles

Do school fountains spread COVID? Why one district is giving students water bottles

Credit: CC0 Public Domain In North Carolina, the Chapel Hill-Carrboro schools is giving students water bottles they can top off throughout the day at bottle-filling stations installed at each of the district’s 20 schools. The school district notified families and staff that it was fitting water fountains that have been turned off since the start …

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Spread of Delta SARS-CoV-2 variant driven by combination of immune escape and increased infectivity

Spread of Delta SARS-CoV-2 variant driven by combination of immune escape and increased infectivity

Credit: Pixabay/CC0 Public Domain The Delta variant of SARS-CoV-2, which has become the dominant variant in countries including India and the UK, has most likely spread through its ability to evade neutralizing antibodies and its increased infectivity, say an international team of researchers. The findings are reported today in Nature. As SARS-CoV-2 replicates, errors in …

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High incarceration rates fuel COVID-19 spread and undermine US public safety

High incarceration rates fuel COVID-19 spread and undermine US public safety

Credit: Pixabay/CC0 Public Domain How can government slow the spread of COVID-19 in the U.S.? Look to America’s unique epidemic engines: jails and prisons in America. Extremely high rates of incarceration in the U.S. undercut national public health and safety. The overcrowded, tight quarters in jails fuel constant risks of outbreaks. Add to that the …

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Unvaccinated US school teacher spread COVID to 26 people

Unvaccinated US school teacher spread COVID to 26 people

Students and parents arrive masked for the first day of the school year at an elementary school in Los Angeles. An unvaccinated teacher at an elementary school in California spread the coronavirus to at least 26 other people, including 12 students in their classroom, a new study by the Centers for Disease Control and Prevention …

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Canada's first case of Brazilian virus strain detected

Rotating presence at school, work limits COVID spread: study

Credit: CC0 Public Domain The best way to keep COVID cases out of businesses and schools while maintaining some in-person presence is to create two rotating groups, a French study showed Thursday. Several research institutions including the CNRS and the University of Paris mapped real-world contact networks using data from a high school, a primary …

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Most respiratory viruses spread by aerosols

Most respiratory viruses spread by aerosols

Phases involved in airborne transmission of respiratory viruses. Credit: From Wang et al., ‘Airborne transmission of respiratory viruses’ (10.1126/science.abd9149). N.Cary/Science SARS-CoV-2, the virus behind today’s global coronavirus pandemic, spreads primarily by inhalation of virus-laden aerosols at both short and long ranges —and a comprehensive new assessment of respiratory viruses finds that many others probably do …

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