coronavirus disease 2019; health care access; health care planning; health care policy; human; immigrant; Letter; migrant; pandemic; priority journal; refugee; rural area; social exclusion; South and Central America; vulnerable population; Betacoronavirus; communicable disease control; Coronavirus infection; migration; organization and management; pandemic; South and Central America; virus pneumonia; Betacoronavirus; Communicable Disease Control; Coronavirus Infections; Emigrants and Immigrants; Humans; Latin America; Pandemics; Pneumonia, Viral; Transients and Migrants