As the first chapter, Terán, Cisneros and Gutiérrez present Knowledge of health personnel about HPV screening tests: a systematic review, as second chapter, González, Meraz, Chávez and González will discuss Health Risk Behaviors and Emotional State of Medical Students as third chapter, Aguilar, Morado, Villada and Tovar present Early trauma as conditioning of psychopathology in adult women, as fourth chapter, Torre, Therio, Carrillo and Mendoza propose Growth and development of the craniofacial region and the stomatognathic apparatus, as the fifth chapter, Villarreal, Enriquez, Hernández and Medina, perform Assessment of physical activity, sedentary behaviors and physical fitness in perimenopausal women, as the sixth chapter, Díaz, González, Uvalle and Mederos develop Pro-Inflammatory cytokines: Leptin and visfatin associated to obesity in young university students, as seventh chapter, Enríquez, Vieyra, Ramos and Trujillo, will discuss Presence of neuroglobin in the substantia nigra in a murine model of parkinson's disease: an immunohistochemical study, in eighth chapter, Martínez, Tavizon, Carlos and Mauricio present Prevalence of ectopic eruption and intercanine distance in children aged 6 to 12 years. Cycle 2019-2020, as the ninth chapter, Caceres, Zárate, Flores and Bustillos, performed Anxiety in medical students, during a COVID-19 pandemic and as the last chapter, González, Hernández, Martínez and González, focus on Overwiev of general plant toxicology uses and adverse effects.

In recent years, society has achieved a better quality of life; this has been possible thanks to scientific and technological advances. Among the advances that have allowed us to move forward is, without a doubt, the development of the vaccine against the SARS-CoV-2 virus. The method used for the synthesis of this vaccine was developed by Ugur Sahin and Öezlem Türeci, founders of BioNTech. Yes, behind the scientific development of greatest impact and relevance in recent years are a man and a woman. This scientific development was possible thanks to both of them, and here it is important to highlight the quality of women in science related to seeing issues from another perspective. Therefore, the union of their strengths and their differences made it possible to have a vaccine that makes it possible to return to life without confinement, without fear of going out, and with the possibility of enjoying it. Thus, the role of women in science is not only valuable, but fundamental to solve the problems that afflict us today. In this context, I can only thank and congratulate the women who today, thanks to their training, discipline and commitment, are giving us this wonderful work of science. I am sure that more challenges will come, but always counting on them, we will come out ahead. My most sincere appreciation and admiration.