Aircraft passengers and crew are lining a coronavirus disease pandemic. This pandemic may last for many months, stressing the aviation industries. With over two billion airline passengers yearly, in-flight transmission of contagious diseases is an essential worldwide health interest. Some attitudes of in-flight transmission have been registered, cases of coronavirus disease (COVID-19) have been reported in all over the world, traveling raises your risks of receiving and scattering COVID-19. Because of how air flows and is cleaned on airplanes, maximum viruses and other microorganisms do not spread effortlessly on flights. Nevertheless, there may be a possibility of receiving COVID-19 on crowded flights if there are other passengers inside the aircraft cabin with COVID-19. So the main objective of this study is to explain the relation between the aircraft cabin ventilation systems with the spread of COVID-19 inside an aircraft cabin. Aircraft ventilation strategies and their effect on air quality were discussed in this study. Control measures and some aircraft cabin seats arrangement proposals were also presented in this study.

The study of bacterial 16S rRNA genes is facilitated with the assistance of next-generation sequencing methods (NGS) which allow a thorough investigation of vaginal microbial community makeup to an extent not achievable with regular culture-supported microbiological methods. The human papillomavirus (HPV) triggers cervical intraepithelial neoplasia (CIN), the precursor of cervical malignancy. Vaginal microbiota has a mutualistic symbiotic connection with their host and has a significant influence on health and disease. Surging proof points to a likely connection between the vaginal microbiota and repeated HPV infections. Some vaginal microbial types can be either prophylactic or pathogenic in cancer development of the cervix after repeated HPV infection. In this review, we discussed the composition and structure of the vaginal microbiota as well as the relationship between HPV infection and the vaginal microbiota. We also covered the link between the vaginal microbiome, HPV, and immune response.