COVID-19 belongs to a typical class of viruses that predominantly affects the human respiratory system, thereby proving to be fatal to many. The virus, along with other air pollutant particulates poses a severe threat to the human respiratory organs. Since the most common transmission mode is respiratory fomites and aerosol particulates, it is necessary to prevent their ingression through a mask. The primary use of masks is to prevent aerial particulates. This paper reveals the development of masks with air filters coated with functionalized graphene (fG) mounted on a 3D-printed facial mask replica. The fused deposition modeling (FDM) process is used for fabricating the facial mask replica. fG associated with nanosheets has an additional adsorbing capacity with a high surface area to volume ratio. fG coat is used over a polypropylene (PP) cloth through a dip coating method to enhance the antiviral and antimicrobial properties. The quality of fG is investigated through Raman spectroscopy and other characterization techniques such as SEM, XRD, and FTIR were used for visual interpretation of distributions of fG on a polypropylene (PP) fabric. Fabricated fG coated MB filters show 98.2 % of bacterial filtration efficiency with 1.10 mbar of breathing resistance. The efficacy of the fG coated filter is tested against SARS-CoV-2 viral particles, which shows a complete arrest of viral transmission at the fG coated layer.

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Fanconi anemia is an extremely rare genetic disease characterized by chromosomal instability that induces congenital alterations in individuals. It causes defective hemopoiesis ultimately leading to bone marrow failure. Patients are susceptible to recurrent infections and increased risk of hemorrhage, as well as delayed and poor wound healing. Herein, we report a case of Fanconi anemia in which various classical signs of the disease were present. The patient has been on regular follow-up since three and a half years for management of dental problems. The different aspects of this rare disorder are discussed with emphasis on oral manifestations and their influence on the general health of affected patients. Due to an increased susceptibility to developing cancers in this specific population, it is imperative for pediatric dentists to know about the common oral manifestations and potentially cancerous lesions, in order to make an early diagnosis and provide comprehensive care and maintenance of oral health in affected individuals.

Nanoscale-thick silver thin films (Ag-NTF) on indium tin oxide-coated glasses are fabricated at different deposition potentials (1.0−5.0 V) using an electrochemical threedimensional (3D) printing process. The printing process is carried out using a nozzle with a diameter of 0.25 mm and a printing speed of 1.0 mm s −1 . The X-ray diffraction (XRD) data showed that the mean crystallite size of Ag is 17 nm. The optical and field emission scanning electron microscopy (FESEM) data revealed the uniform NTF nature of the Ag-NTF electrode. Transmission electron microscopy (TEM) data showed that Ag-NTF electrode particles have a spherical shape with an average size of 21 nm. Furthermore, electrochemical surface activity study showed that samples deposited at 3.0 V have the best electrochemical activity, and hence, the same are used to develop hydrogen peroxide sensors. The sensing measurements are done using a 0.1 M phosphate buffer saline (PBS) electrolyte. The sensitivity of the Ag-NTF comes out to be 25 ± 1 μA mM −1 cm −2 with a lower detection limit (LOD) of 1.0 μM. The selectivity of the electrode is tested using various interfering chemicals. The developed sensors showed excellent selectivity toward H 2 O 2 . Finally, the applicability of the Ag-NTF electrodes toward real-life samples is shown using bovine albumin serum (BSA) and rainwater. For the first time, this study has demonstrated the use of an electrochemical 3D printing process to fabricate electrodes for H 2 O 2 sensing. The inherent nature of the process has the capability to eliminate the conventional tedious route to make such electrodes and to provide a one-step and efficient solution.