Background: A population study is an important tool that can be used to understand the actual epidemiological scenario of the Covid-19 in different territories, identify its magnitude, understand its transmission dynamics, and its demographic, geographical, and social distribution. Objective: The aim of this study was to determine the prevalence and dynamics of SARS-CoV-2 infection in the population of two Brazilian cities during the pandemic first wave and subsequent socioeconomic and health effects. Materials & methods: This paper described the methodological procedures adopted and the prevalence of the SARS-CoV-2 infection in the population. A household survey was conducted between October and December 2020, in two historic cities of Brazil's mining region. Anti-SARS-CoV-2 antibody was detected using the Wondfo® rapid test. The face-to-face interview consisted of administration of a questionnaire containing registration data, sociodemographic and economic variables, living habits, general health condition, mental health, sleep habits, and eating and nutrition. Results: We evaluated 1,762 residents, of which 764 (43.4%) were in Mariana and 998 (56.6%) in Ouro Preto. For both cities, 51.9% of the interviewees were female, with a predominance of the age range 35 to 59 years old (47.2%). The prevalence of the SARS-CoV-2 infection was 5.5% in all cities, 6.2% in Ouro Preto, and 4.7% in Mariana. The prevalence was similar between cities (P>0.05). Conclusion: The study was effective in verifying the seroprevalence of infection by the virus and its findings will enable further analyses of the health conditions of the population related to social isolation and the risk of infection with SARS-CoV-2.

Avalia-se o uso das unidades básicas e de urgências do Sistema Único de Saúde (SUS) de Belo Horizonte (BH). Objetivos: identificar o principal problema de saúde que o cidadão leva à Unidade de Pronto-atendimento (UPA) e à Unidade Básica de Saúde (UBS), considerando as especificidades dos níveis de atenção; caracterizar os principais procedimentos de atenção básica e de média complexidade utilizados nesses serviços, comparativamente. Pesquisa do tipo survey, com aplicação direta de questionário fechado a 997 entrevistados, distribuídos em 10 UBSs e 7 UPAs. A demanda que chega aos serviços investigados é por consultas médicas e por procedimentos de enfermagem, motivada por afecções leves, passíveis de atendimento na atenção básica. Os usuários vão à UBS por ser um serviço próximo da residência, de rápido atendimento e de fácil deslocamento, caracterizando boa oferta e capilaridade da Saúde da Família. Verificou-se duplicidade na utilização dos serviços, o que contribui para outras investigações.

The use of the Primary Care and Emergency Units of Sistema Único de Saúde (SUS - Brazilian National Health System) was evaluated in the city of Belo Horizonte (Southeastern Brazil). Objectives: to identify the main health problem that the citizen takes to the Emergency Unit and to the Primary Care Unit, considering the specificities of the health care levels; to characterize the main primary level and second level procedures that are used in these services, comparatively. This is a survey in which a closed questionnaire was administered to 997 interviewees from 10 Primary Care Units and 7 Emergency Units. The demand that arrives at the investigated services is for medical consultations and nursing procedures, motivated by minor affections which can be assisted in the Primary Care Unit. Users go to the Primary Care Unit because it is a service that is close to their homes and provides quick assistance, characterizing good offer and capillarity of the Family Health Program. Duplicity in services utilization was verified, which contributes to further investigations.

Avalia-se o uso das unidades básicas e de urgências do Sistema Único de Saúde (SUS) de Belo Horizonte (BH). Objetivos: identificar o principal problema de saúde que o cidadão leva à Unidade de Pronto-atendimento (UPA) e à Unidade Básica de Saúde (UBS), considerando as especificidades dos níveis de atenção; caracterizar os principais procedimentos de atenção básica e de média complexidade utilizados nesses serviços, comparativamente. Pesquisa do tipo survey, com aplicação direta de questionário fechado a 997 entrevistados, distribuídos em 10 UBSs e 7 UPAs. A demanda que chega aos serviços investigados é por consultas médicas e por procedimentos de enfermagem, motivada por afecções leves, passíveis de atendimento na atenção básica. Os usuários vão à UBS por ser um serviço próximo da residência, de rápido atendimento e de fácil deslocamento, caracterizando boa oferta e capilaridade da Saúde da Família. Verificou-se duplicidade na utilização dos serviços, o que contribui para outras investigações.

The use of the Primary Care and Emergency Units of Sistema Único de Saúde (SUS - Brazilian National Health System) was evaluated in the city of Belo Horizonte (Southeastern Brazil). Objectives: to identify the main health problem that the citizen takes to the Emergency Unit and to the Primary Care Unit, considering the specificities of the health care levels; to characterize the main primary level and second level procedures that are used in these services, comparatively. This is a survey in which a closed questionnaire was administered to 997 interviewees from 10 Primary Care Units and 7 Emergency Units. The demand that arrives at the investigated services is for medical consultations and nursing procedures, motivated by minor affections which can be assisted in the Primary Care Unit. Users go to the Primary Care Unit because it is a service that is close to their homes and provides quick assistance, characterizing good offer and capillarity of the Family Health Program. Duplicity in services utilization was verified, which contributes to further investigations.