The COVID-19 pandemic generated great and profound changes in all aspects of life, so abruptly and rapidly that no one could have imagined. These have had repercussions, among many other aspects, in the educational processes of medical residency programs (1,2). Medical education underwent important and sudden changes, to which both students and teachers had to adapt, assuming the new challenges brought about by the pandemic.

The recommendations of the regulatory bodies were initially very strict and established multiple restrictions, several of which were to maintain physical distance, limit meetings involving groups of people in closed places (including academic meetings), as well as to seek generalized isolation. Undoubtedly, such restrictions directly impacted medical education and limited face-to-face attendance. However, medical education has always been understood as a process that requires and implies face-to-face interaction between teachers and students, in which there is usually teacher supervision in different clinical practice scenarios. Thus, it was a great challenge to assume and understand the virtualization of medical education, as a great change derived from the restrictions due to the COVID-19 pandemic (3,4).

With this in mind, it is important to highlight that in the health care setting, local epidemiological conditions have irremediably modified the number, volume, and characteristics of the patients attended; the exposure to procedures and interventions, and the daily clinical experience, and in the clinical teaching processes, the continuity of the curricular academic sessions, as well as the educational modalities used by teachers and students (5,6). While it is true that virtualization of content as an alternative will not replace the acquisition of skills in clinical settings, it is an undeniable reality that during these critical months it has been the main teaching tool in many residency programs around the world, some of which, out of necessity, have even suspended the attendance of graduate students to their practice settings altogether (7-9).

It is difficult to think of virtualization as a fundamental axis of medical education; however, this is the reality to which we have been abruptly thrown into. This is why it should perhaps be thought of as a complement to the different activities that make up medical education; a complement that for now occupies a fundamental place in the training processes and that will continue to occupy an important place in the coming years. But we cannot overlook the crucial role played by clinical practice scenarios, which are fundamental for medical education. The pandemic will certainly have greater repercussions in some fields of medicine, especially in the surgical field, where clinical practice has been more than modified.

Many researchers in different parts of the world have made an effort to describe and share their experience regarding the changes generated in medical education by the COVID-19 pandemic. In general, they coincide in showing how each one, from their experiences, has been able to face them and how they have adapted to maintain the quality and continuity of medical education. However, very few have focused on describing the perception of residents or teachers on the changes brought about by the pandemic (10-14). In this article, we will not only refer to the changes in the educational processes that we have experienced locally but, in turn, we intend to highlight the perception that residents have had in their training process during these months.

This was a retrospective descriptive study. In July 2020, the "COVID-19 Contingency Resident Survey" was implemented, which was electronic, voluntary, and anonymous. It was sent by institutional e-mail to all residents of medical specialties, both clinical and surgical, rotating at the Hospital Universitario San Ignacio (HUSI). The survey was completed by 299 residents. Initially, the survey was implemented and then the research protocol was developed based on its results, and therefore this is a retrospective study.

All HUSI residents who completed the survey were included. No exclusion criteria were established. And, to describe the variables to be evaluated, the data extracted from the survey were reviewed and taken. Absolute and relative frequencies were used to describe the categorical variables. The survey had different questions, mainly related to theoretical academic activities (master classes, subject reviews, journal club, among others). The survey did not include questions specifically related to clinical practice or care scenarios, which would correspond to practical academic activities (for example perception of surgical procedures, perception of the new epidemiological profile of patients, perception of the change in care load, etc.). In addition, the survey did not directly ask students to make a comparison with academic activities before the onset of the pandemic. The survey questions were oriented to know the current perception of the residents with the virtualization of academic activities.

The COVID-19 pandemic has brought with it great challenges and consequences in medical education, both locally (9) and globally (10-13). Medical schools in the country were forced to abruptly suspend all face-to-face activities. Hence, different medical schools have made a great effort, not only financially but also in terms of human resources, by investing in virtual platforms that guarantee the continuity of the students' training processes. The fundamental axis throughout this process of change has been to maintain the continuity and quality of the training processes, in such a way as to minimize the repercussions that can occur when we think of medical education as separate from clinical practice scenarios.

Hence, in this whole process, the virtualization of academic activities has constituted a new reality, in which informatics tools have played a fundamental role. This has highlighted the need for innovative digital technologies and resources to ensure the quality of medical education, because the long-term impact of the pandemic is still unknown, but is presumed to be considerable.

The "COVID-19 Contingency Resident Survey" provided insight into residents' perception of the major changes generated by the COVID-19 pandemic in their training process as specialists. Although many researchers around the world have shared their experience regarding the adaptation of the educational processes to the changes and restrictions derived from the COVID-19 pandemic, very few have focused on the perception of the residents (students) in the face of these changes.

Shima Tabatabai (8), in his article on the impact of COVID-19 and virtual medical education, explained how medical education has had to be transformed into a virtual process. We agree with the author that the priority should be the safety of both students and teachers. However, continuity in the training processes cannot be overlooked. In addition, we agree on the importance of computer resources and how adjustments should be made—in some cases, information systems should be strengthened—to guarantee the quality of educational processes in medicine. Finally, we agree that the virtualization of medical education is a reality that will surely remain in time, possibly with progressive changes and reductions in the use of computer tools, but that it will undoubtedly continue to play an important role in medical schools.

Dedeilia et al. (15) conducted a systematic review of the challenges and innovations in medical education during the COVID-19 pandemic, in which 61 articles were included. Regarding the challenges, we agree with the authors on the great decrease in face-to-face attendance in clinical practice settings, which translates into a decrease in direct contact with patients. However, with respect to innovations, we agree that the virtualization of medical education made it necessary to create innovative strategies (teleconferencing, online classes, among others) to guarantee the quality and continuity of medical education.

One of the limitations of this study is that the survey did not include questions related to the practical academic activities of the residents, i.e., concerning the perception of the care activities of the residents in clinical practice scenarios. The questions contained in the survey were oriented to know the perception of the residents regarding mainly theoretical activities (master classes, journal club, topic reviews, etc.). In this order of ideas, it was not possible to know or have information on the practical-assistance activities, which are undoubtedly of great value.

At HUSI, face-to-face academic activities were quickly suspended and, to guarantee their continuity and quality, they were adapted to virtuality. We consider that the virtualization of medical education is a reality to which we have adapted and which will surely continue to be important in the coming years. Despite the advent of vaccines, measures continue to be implemented to minimize the risk of contagion for both teachers and students.

Thus, it has been possible to maintain the safety of both teachers and students during the pandemic, and a great effort has been made to maintain quality theoretical academic activities through the available virtual platforms. In general, this adaptation has been perceived positively by the residents. It is undeniable that clinical exposure time decreased significantly and the repercussions of this important limitation are still unclear.

The COVID-19 pandemic has influenced all educational processes and all aspects of them. Undoubtedly, medical-surgical specialties have not been the exception. The pandemic has forced us to adapt to a new reality in which virtualization has been the protagonist.

Educational strategies have changed drastically and have involved a rapid adaptation of both students and teachers to new information technologies. For some programs, large investments were necessary to strengthen virtual education through various computer platforms.

The decrease in exposure to clinical scenarios, as well as the change in the epidemiological profile of hospitals, will have repercussions on the training of residents. For this reason, efforts should be made to maintain high-quality theoretical and practical academic activities, which in some way reduce the consequences of the decrease in the burden of care and presence in clinical practice scenarios. The survey conducted at HUSI allowed us to understand locally the perception that residents have had of all these changes, and from which a positive perception was found in all specialties regarding the continuity and quality of theoretical academic activities.

This work was made possible by the Hospital Universitario San Ignacio.

The authors declare no conflict of interest.