Purpose: The aim of this study is to deepen understanding of the structure of the vaccine against SARS-CoV-2 infection and the underlying mechanism so that its efficacy and effectiveness can be assessed. Method: used in this journal is a systematic literature review. References for this review were identified through searches of PubMed, Google Scholar, BioRxiv, MedRxiv, drug regulatory agencies, and pharmaceutical company websites. Results: Overall, all COVID-19 vaccines had high efficacy against the SARS-CoV-2 strain and were well tolerated. All vaccines appear to be a safe and effective strategy to prevent COVID-19 from getting worse. Limitations: Further research is needed to assess the magnitude of the risks of using the vaccine against its benefits in preventing SARS-CoV-2 infection. Contribution: By understanding the structure of the vaccine and its mechanism of action, it is hoped that the selection of the right vaccine can effectively suppress the pandemic.

Purpose: To describe the ways in increasing the internet awareness for the mental health of the children and adolescent. Methodology/approach: It is a narrative literature review. Articles were taken from the Science Direct and Google Scholar databases. Inclusion criteria are review and research articles. The excluded articles that were not peer-reviewed and unavailable full-text paper. Articles were read twice to reduce the bias. The selected articles were summarized and narrated descriptively. Results/findings: Results revealed that cybersecurity awareness can be increased by digital literacy training. Children should be taught how to avoid risky online behaviour to increase the mental health of the children. The cybersecurity awareness program is good to be given to children in avoiding phishing, pornography, cyberbullying, identity theft, and breaking to privacy. Children must be taught how to keep their passwords safe and private. They also need to be more cautious when playing online games. Limitations: It is a narrative literature review, the result is not as accurate as a study. Contribution: The contribution is the digital literation and cyber security program can be taught to the children to keep the good mental health during the COVID-19 pandemic and the time beyond.  

Purpose: To describe the COVID-19 vaccination from the aspects of cost-effectiveness, monetary benefit, fiscal modeling, and health efficacy. Method: It is a systematic literature review. This systematic review described COVID-19 vaccination effectiveness from health economic perspectives, cost-effectiveness, monetary benefit, fiscal modeling, and heath efficacy. Literatures were taken from PubMed and Science Direct. There were 10 papers from PubMed, 3 papers from Science Direct, and 186 from Google Scholar at the beginning. After being selected for title, abstract and full content, 11 journals were left. PRISMA guidelines were used. Inclusion criteria are review and research articles. The excluded articles that were not peer-reviewed and unavailable full-text paper. Articles were read twice to reduce the bias. The selected articles were summarized and narrated descriptively. Results: Results revealed that vaccination is cost-effective and cost-saving based on economic model analysis such as QALY rate, global COVID-19 VAR model, and ICER. The mortality and morbidity of the COVID-19 infection are depended on the vaccination program. Limitations: There were only some articles included in the systematic review. Therefore, the result might be not complete and comprehensive. Contribution: This paper can be used as a review for implementing the vaccination program based on the effectiveness from health economic perspectives.