The appearance of objects can often change. For example, in dim evenings or fog, the contrast of the objects decreases, making it difficult to distinguish them. However, after repeatedly encountering specific objects, the brain can identify them even if they become indistinct. The exact mechanism contributing to the perception of low-contrast familiar objects remains unknown.
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In this article BA DAL UAL HLT Passengers, wearing protective face masks, walk through the international arrivals hall after arriving at Terminal 2 at London Heathrow Airport. Simon Dawson | Bloomberg | Getty Images Boeing, airlines and other travel stocks tumbled on Friday after several European and Asian countries announced new travel restrictions from southern
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In this article XRP.CM= ETH.CM= BTC.CM= Bitcoin prices fell sharply amid the global sell-off in equities. Luke MacGregor  | Bloomberg | Getty Images Bitcoin fell sharply alongside other assets on Friday, hitting a seven-week low and officially entering bear market territory. The world’s biggest cryptocurrency sank nearly 8% in the last 24 hours to $54,315,
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Multisystem inflammatory syndrome (MIS) is a new systemic inflammatory acute onset disease that mainly affects children (MIS-C) and, at a lesser frequency, adults. The disease usually occurs in children 3-6 weeks after acute severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection. Study: Autoantibody Release in Children after Corona Virus mRNA Vaccination: A Risk Factor of
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In this article PFE BNTX A vial of Pfizer-BioNTech Covid-19 vaccine. Getty Images Pfizer and BioNTech are investigating the new, heavily mutated variant of the virus that causes Covid-19, the companies said Friday morning. “We understand the concern of experts and have immediately initiated investigations on variant B.1.1.529,” the companies said. Pfizer and BioNTech said
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Researchers at Yale University analyzing specialized MRI exams found significant changes in the microstructure of the brain’s white matter in adolescents and young adults with autism spectrum disorder (ASD) compared to a control group, according to research being presented next week at the annual meeting of the Radiological Society of North America (RSNA). The changes
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A nurse prepares the Pfizer-BioNTech Covid-19 vaccine for children for distribution in Montreal, Quebec on November 24, 2021. ANDREJ IVANOV | AFP | Getty Images The World Health Organization on Friday assigned the Greek letter Omicron to a newly identified Covid variant in South Africa. The U.N. health agency recognized the strain, previously referred to
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The infection prevention and control (IPC) measures initially implemented to limit transmission of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) during 2020 and 2021 successfully reduced the incidence and transmission of coronavirus disease 2019 (COVID-19) and other respiratory tract viruses. Study: A comparison of health care use after severe COVID-19, respiratory syncytial virus, and influenza
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A man enters the headquarters of the World Health Organization (WHO) on June 15, 2021 in Geneva, Switzerland. Sean Gallup | Getty Images The World Health Organization will meet on Friday to discuss a new heavily-mutated variant of Covid-19. The variant known as B.1.1.529 has been detected in small numbers in South Africa, WHO officials
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Quarraisha Abdool Karim has spent the past three decades studying HIV and AIDS. She has become one of the world’s leading epidemiologists and made major contributions to the global understanding of how HIV affects young women. As associate scientific director of the Centre for the AIDS Programme of Research in South Africa (CAPRISA), Abdool Karim
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RT: Maria Van Kerkhove, Head a.i. Emerging Diseases and Zoonosis at the World Health Organization (WHO), speaks during a news conference on the situation of the coronavirus at the United Nations in Geneva, Switzerland, January 29, 2020. Denis Balibouse | Reuters The World Health Organization is monitoring a new variant with numerous mutations to the
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Since the emergence of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), it has undergone several mutations giving rise to different variants of the virus. The current and most notorious variant among them is the Delta variant. It is more contagious and infectious compared to the previous variants of SARS-CoV-2. Therefore, the Delta variant has been
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The perception of gender in children’s voices is of special interest to researchers, because voices of young boys and girls are very similar before the age of puberty. Adult male and female voices are often quite different acoustically, making gender identification fairly easy. Gender perception is much more complicated in children because gender differences in
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BERLIN, GERMANY – SEPTEMBER 22: German Chancellor Angela Merkel (L) speaks with Vice Chancellor and Federal Minister of Finance Olaf Scholz. Pool | Getty Images News | Getty Images Germany’s Covid-19 crisis continues to rock the nation with the grim news on Thursday that the total number of deaths has now surpassed 100,000. The country’s
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World Health Organization (WHO) Director-General Tedros Adhanom Ghebreyesus attends a news conference organized by Geneva Association of United Nations Correspondents (ACANU) amid the COVID-19 outbreak, at the WHO headquarters in Geneva Switzerland July 3, 2020. Fabrice Coffrini | Pool | Reuters The World Health Organization is urging the public to practice Covid mitigation tactics –
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Coronavirus disease 2019 (COVID-19) vaccines effectively prevent severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2)-related illness and death.  Because COVID-19 vaccines are not 100% effective in preventing illness, certain infections among those who have been vaccinated are expected. The involvement of vaccinated people in the transmission will be a major predictor of the pandemic’s future trajectory
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Cynthia Rogers, MD, visits a baby in the Newborn Intensive Care Unit at St. Louis Children’s Hospital. Rogers is helping lead a national study aimed at understanding how prenatal factors and early life experiences influence brain development and behavior in infants and young children. Researchers at Washington University School of Medicine in St. Louis are
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U.S. President Joe Biden speaks in the Eisenhower Executive Office Building in Washington, D.C., U.S., on Thursday, Oct. 14, 2021. Al Drago | Bloomberg | Getty Images The Biden administration on Tuesday asked a federal appeals court to immediately lift an order halting its Covid vaccine and testing requirements for private businesses, warning that delaying
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Contact tracing has been a core component of the public health response to the coronavirus 2019 (COVID-19) pandemic. Its main objective is to interrupt transmission chains by identifying people who had contact with a case to promptly quarantine people at risk of infection, thereby reducing further transmission. This is to effectively minimize the workload for public
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