Navigating the waves in Colombia: a cohort study of inpatient care during four COVID-19 waves David E. Rebellón-Sánchez; Tania M. Guzmán; Sarita Rodriguez; Julio Llanos-Torres; Daniela Vinueza; Eric Tafurt; Estefanía Beltrán; Álvaro Martínez; Fernando Rosso;

Impact of COVID-19 on income, prevention attitudes, and access to healthcare among male clients in a Sexually Transmitted Infections clinic Fernanda Rick; Bruno Issao Ishigami; François José Figueiroa; Lucas Rafael de Castro Cahete; Renato Chuster H Humar; Roberto de Jesus; Marcos A. Costa Junior; Adele S. Benzaken; Vivian I. Avelino-Silva;

COVID-19 pneumonia in an HIV-positive woman on antiretroviral therapy and undetectable viral load in Porto Alegre, Brazil Murillo Machado Cipolat; Eduardo Sprinz;