Abstract Background CD4-independence has been taken as a sign of a more open envelope structure that is more accessible to neutralizing antibodies and may confer altered cell tropism.In the present study, we analyzed SIVsm isolates for CD4-independent use of CCR5, mode of CCR5-use and macrophage tropism.The isolates have been collected sequentially
Limited capability and political will have caused the great powers to fail to demonstrate their global leadership in the fight against the COVID-19 Probes pandemic, which has created greater room to manoeuvre for other countries to influence international affairs.Preliminary achievements in the fight against the COVID-19 crisis have buttressed the
To solve the problem of defect detection in printed fabrics caused by abundant colors inductor motor and varied patterns, a defect detection method based on RGB accumulative average method (RGBAAM) and image pyramid matching is proposed.First, the minimum period of the printed fabric is calculated by the RGBAAM.Second, a Gaussian pyramid is constru
BackgroundThe COVID-19 pandemic has had a profound global impact on governments, health care systems, economies, and populations around the world.Within the East Asia and Pacific region, some countries have mitigated the spread of the novel coronavirus effectively Quilt Patterns and largely avoided severe negative consequences, while others still s
Abstract Background Clinical ultrasound is commonly used in medical practices worldwide due to the multiple benefits the modality offers clinicians.Rigorous credentialing standards are necessary to safeguard patients against operator errors.The purpose of the study was to establish and analyse the barriers that specifically lead to poor credentiali