Prion, Viral, Bacterial and Fungal Pathogens of Humans [VV210]; Health Services [UU350]; Diagnosis of Human Disease [VV720]; public health; community health; human diseases; coronavirus disease 2019; viral diseases; pandemics; elderly; homes; longitudinal studies; screening; man; Severe acute respiratory syndrome coronavirus 2; Cuba; Homo; Hominidae; primates; mammals; vertebrates; Chordata; animals; eukaryotes; Greater Antilles; Antilles; Caribbean; America; high Human Development Index countries; Latin America; upper-middle income countries; Severe acute respiratory syndrome-related coronavirus; Betacoronavirus; Coronavirinae; Coronaviridae; Nidovirales; positive-sense ssRNA Viruses; ssRNA Viruses; RNA Viruses; viruses; SARS-CoV-2; viral infections; aged; elderly people; older adults; senior citizens; screening tests