| Table of contents Nova scientia vol.13 n.spe León 2021 Natural sciences and engineering | | | | · Pre-existing comorbidity, the highest risk factor for poor prognosis of COVID-19 among the Mexican population Calixto-Calderón, Basilio; Vázquez-González, María F.; Martínez-Peláez, Rafael; Bermeo-Escalona, Josué R.; García, Vicente; Mena, Luis J.; Maestre, Gladys; Parra-Michel, Jorge R.; Ceja Bravo, Leobardo A.; López-de-Alba, Pedro L.
| | | | · COVID-19, diabetes, and the immune system Moreno-González, Janette G.; Siqueiros-Cendón, Tania; Moreno-Brito, Verónica; Licón Trillo, Ángel; González-Rodríguez, Everardo; Leal-Berumen, Irene; Rascón-Cruz, Quintín
| | | | · Seroprevalence and follow up of IgG antibodies to SARS-CoV-2 in health-care staff from Guanajuato State Laboratory of Public Health LaESaP Alvarado Orozco, María; Rangel Aguilera, Juan Manuel; Barba Hernández, Beatriz Adriana; García Baeza, Lorena Carina; Sánchez Navarro, María del Rosario
| | | | · Causes of death among COVID-19 patients in Mexico City González-Ramírez, Juan Antonio
| | | Human and social sciences | | | | · Impact of COVID-19 in the production, employment, and digitization of companies in Guanajuato: a first approach Martínez Martínez, Adriana
| | | | · Innovation practices implemented by MSMEs in the restaurant sector in the face of COVID-19 in Tabasco, Mexico Cruz-May, Samuel de la; May-Guillermo, Erika Guadalupe
| | | | · Adjustment mechanisms and digital transformation of micro and small companies in the face of COVID-19 in Mexico Chiatchoua, Cesaire; Lozano Arizmendi, María del Carmen
| | | | · Socioeconomic and structural profiles of the informal sector in the COVID-19 pandemics Esparza-Rodríguez, Saúl Alfonso; Martínez-Arroyo, Jaime; Sánchez-Vargas, Armando
| | | | · Change management, virtual collaboration, and strategic organizational agility of Mexican companies in the face of COVID-19 impacts Fierro-Moreno, Eréndira
| | | | · Construction and validation of the Inventory of Negative and Disturbing Emotional Responses in Pandemic Contexts (IREN-35) in the mexican population Flores-Morales, Rogelio; Reidil-Martínez, Lucy María; Adame-Rivas, Adriana Karime; Reyes-Pérez, Verónica
| | | | · COVID-19 confinement and detection of non-organic sleep-wake cycle disorders in high-performance athletes Zapata Salazar, Joel; Ríos Esparza, Jesús Alberto; Santos Ramírez, Stefany de los
| | | | · Personal motivation and learning self-management in students, as result of the transition to online courses during COVID-19 pandemic Chávez-Miyauchi, Tomás-Eduardo; Benítez-Rico, Adriana; Alcántara-Flores, Manuel; Vergara-Castañeda, Arely; Ogando-Justo, Ana-Belén
| | | | · Perception of Youth during the COVID-19 contingency in Morelia, Michoacan Valenzo-Jiménez, M. A.; Lázaro-López, D. A.; Martínez-Arroyo, J. A.
| | | | · Psychological distress, sanitary measures and health status in student’s university Gutiérrez-García, Raúl A.; Amador Licona, Norma; Sánchez Ruiz, Abraham; Fernández Reyes, Pamela Lili
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