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1.
Journal of Pediatric Infectious Diseases ; 2022.
Article in English | EMBASE | ID: covidwho-1956444

ABSTRACT

Objective The research on severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) mainly consists of adult patients, leaving its impact on children understudied. This study aims to investigate the correlations between viral load, clinical course, age, and Alpha variant (B.1.1.7) in children. Methods The study was conducted on children under the age of 18 years, who were admitted to Amasya University Sabuncuoglu Serefeddin Research and Training Hospital in Turkey between February and April 2021. ΔCt values, which were obtained by real-time polymerase chain reaction (PCR), were analyzed to estimate the viral loads of the patients. Alpha variant (B.1.1.7) positivity was determined by real-time PCR. Results There was no difference between estimated viral loads of different clinical courses (p > 0.05), or between asymptomatic and symptomatic patients (p > 0.05). Viral loads were found to decrease with increasing age (p = 0.002). Also, a higher rate of symptomatic disease was found in children under the age of 4 years (p < 0.05). Alpha variant (B.1.1.7) was not found to be associated with severe disease in children (p > 0.05). Conclusion Our results demonstrate higher viral loads and symptomatic disease in children under the age of 4 years. Alpha variant (B.1.1.7) was not found to be related to disease severity. There has not been a consensus on the vaccination of the pediatric population worldwide. More studies are needed to understand the viral kinetics of SARS-CoV-2 and its severity on children to build effective vaccination strategies in children as public health restrictions are eased.

2.
Indian Journal of Fibre & Textile Research ; 47(1):125-130, 2022.
Article in English | Web of Science | ID: covidwho-1762167

ABSTRACT

In this study, the performance characteristics of various surgical masks have been examined. Several physical properties, such as air permeability, tensile strength, and calculated surface porosity of 8 commercial 3-layer surgical masks, with all spunbonded layers and meltblown middle layer, have been determined and then compared. The production type of the nonwoven layer is effective on the air permeability values, and the values of the spunbonded masks are found higher than the masks containing a meltblown layer. The air permeability of the latter masks varies with the weight per unit area of the meltblown layer. Moreover, calculated porosities of the spunbonded masks are higher than those of the others. The influence of meltblown layers is found effective on the tensile strength values in machine direction.

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