The green synthesis of silver nanoparticles has been proposed as an eco-friendly and cost-effective substitute for chemical and physical methods. The aim of this study was to synthesize and characterize silver nanoparticles using the peel extract of Citrus aurantifolia fruit, and to determine the possible phytochemical constituents’ presence in the plant extracts that might be responsible for the synthesis. Citrus aurantifolia fruit peel extraction was followed by phytochemical studies of secondary metabolites, FTIR analysis confirmation of functional groups, and GC–MS analysis. Silver nanoparticles were synthesized through bio-reduction of silver ions (Ag+) to silver nanoparticles using CAFPE and characterized using UV-Vis spectroscopy, HR–TEM, FESEM, EDX, XRD, DLS, and FTIR. The presence of plant secondary metabolites such as alkaloids, flavonoids, tannins, saponins, phenols, terpenoids, and steroids was detected. The FTIR analysis of the extract revealed the presence of functional groups like hydroxyl, carboxyl, carbonyl, amine, and phenyl, whereas the GC–MS analysis indicated presence of chemical compounds such as 1,2,4-Benzenetricarboxylic acid, Fumaric acid, nonyl pentadecyl, and 4-Methyl-2-trimethylsilyloxy-acetophenone, etc., with similar functional groups. The synthesized silver nanoparticle (AgNP) has displayed the characteristics of a surface plasmon resonance (SPR) band peak from 360–405 nm. High resolution transmission electron microscope (HR-TEM) and field emission scan electron microscope (FESEM) confirm polydisperse, spherical shaped, and smooth surface nanoparticles with an average size of 24.023 nm. Energy dispersive X-ray (EDX) analysis further revealed that silver is the most abundant element found in the micrograph of the nanoparticles, and FTIR analysis further confirmed the presence of different functional groups in the surface of the nanoparticle. The XRD analysis also confirmed that the nanoparticles synthesized are crystalline in nature. Based on the findings of this study, it is understood that the variety of natural compounds that are present in plant extracts of Citrus aurantifolia fruit peel can act as both reducing and stabilizing agents for the synthesis of silver nanoparticles. It is, therefore, concluded that Citrus aurantifolia peel extract can be potentially used for the large production of silver nanoparticles for several applications.

Malaysian government started the Movement Control Order (MCO) on 18th March 2020, as one of the initiatives to prevent the more massive outbreak of COVID-19. Recent statistics showed a rapid rise in the numbers of positive COVID-19 patients. However, the statistics on COVID-19 patients being discharged showed that the higher authority was very committed in managing COVID-19 crisis. This online study was conducted among 1,543 Malaysian adults using a validated questionnaire to explore more ϑindings on the Malaysian’s Knowledge, Attitude and Practice (KAP) level towards COVID19 prevention during the MCO period. Descriptive study and binary logistic regression were performed using SPSS version 22. This study showed that the majority of respondents have good KAP level regarding COVID-19 prevention. WhatsApp and Telegram were the primary sources of information used by the respondents. Education level was the main predictor for knowledge (OR: 2.083, CI: 1.605-2.702), attitude (OR:1.854, Ci; 1.42-2.42) and practice (OR: 1.745, CI; 1.326-2.096) regarding COVID-19 prevention (p<0.001). Knowledge (OR; 1.636, CI: 1.302-2.054) and practice (OR;2.328, CI: 1.858- 2.916) were predictors of attitude regarding COVID-19 prevention (p<0.001). In conclusion, total adherence to the Movement Control Order (MCO) along with public health interventions focusing on behavioral change may play vital roles in breaking the chain of infection.