[COVID-19 in subjects at risk participating in clinical trials during the pandemic in Argentina].

Introduction: There is little information on the presence of COVID-19 in clinical trial participants. The objective of the study was to evaluate the cumulative infection rate for SARS-CoV-2 in this population. Additionally, we investigated the risk, lethality, and mortality from COVID-19.

[Degree of satisfaction with the informed consent process and participation in clinical trials. A 3400 patients' study].

The level of comprehension on the information provided in the process of the informed consent can provide a free and voluntary decision. The comprehension and satisfaction of the participants affect their adherence to clinical trials. The objective of the study was to analyze the level of satisfaction of the subjects with the informed consent process as well as with their participation in clinical trials.

The prevalence of rheumatoid arthritis in Argentina: a capture-recapture study in a city of Buenos Aires province.

Objective: The objective of this study was to assess the prevalence of rheumatoid arthritis (RA) in the population of a city of 70,000 inhabitants located in Buenos Aires, Argentina.

Methods: Based on the hypothesis that RA is an underdiagnosed disease in Argentina, a capture-recapture method was applied. A local registry of RA patients of Luján City was taken as the primary source; a telephone survey was specifically carried out as a secondary source of information.