[Comment on articule "Bibliometric analysis of scientific publications on COVID-19 elaborated by staff of the Instituto Mexicano del Seguro Social"].

In this letter to the editor, some doubts are expressed about the methodology used in the article Bibliometric analysis of scientific publications on COVID-19 elaborated by staff of the Instituto Mexicano del Seguro Social with the purpose of clarifying them and strengthening the scientific rigor with which it was carried out the investigation. The replicability of the studies is essential for other researchers to be able to assess the quality of the study and the validity of its results, in addition to ensuring the transparency of the science.

[The librarian at the Instituto Mexicano del Seguro Social].

In the information units that make up the Instituto Mexicano del Seguro Social (IMSS) Library System, the task of guiding and training users on the use of information is a complex process, due to the specificity of the users' information needs. The information systems that are used in the Institute require the personal librarian to have specific information skills for access, evaluation, organization and use of information through information technologies. However, there are important challenges, such as the lack of definition of the professional profile of the medical librarian, because it is essential for the staff to efficiently satisfy the demands and needs of users according to their various profiles.

[Information services facing the COVID-19 pandemic].

The COVID-19 pandemic caused various effects in the world, among them the saturation of information in the traditional media, as well as in those of scientific dissemination, due to the accelerated production of informative material. At the Mexican Institute for Social Security (Instituto Mexicano del Seguro Social), librarians have contributed to the careful selection of documents as they are in charge of providing specialized information services to health personnel in order to support them in academic, educational, teaching and research activities. In the context of physical distancing, the need for up-to-date and accurate information on the new coronavirus became a priority.