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The native population collapse in 16th century Mexico was a demographic catastrophe with one of the highest death rates in history. Recently developed tree-ring evidence has allowed the levels of precipitation to be reconstructed for north central Mexico, adding to the growing body of epidemiologic evidence and indicating that the 1545 and 1576 epidemics of cocoliztli (Nahuatl for "pest”) were indigenous hemorrhagic fevers transmitted by rodent hosts and aggravated by extreme drought conditions.
There is little knowledge about Latin American social medicine in the English-speaking world. Social medicine groups exist in Argentina, Brazil, Chile, Colombia, Cuba, Ecuador, and Mexico. Dictatorships have created political and economic conditions which are more adverse in some countries than others; in certain instances, practitioners of social medicine have faced unemployment, arrest, torture, exile, and death. Social medicine groups have focused on the social determinants of illness and early death, the effects of social policies such as privatisation and public sector cutbacks, occupational and environmental causes of illness, critical epidemiology, mental health effects of political trauma, the impact of gender, and collaborations with local communities, labour organisations, and indigenous people. The groups' achievements and financial survival have varied, depending partly on the national context. Active professional associations have developed, both nationally and internationally. Several groups have achieved publication in journals and books, despite financial and technical difficulties that might be lessened through a new initiative sponsored by the US National Library of Medicine. The conceptual orientation and research efforts of these groups have tended to challenge current relations of economic and political power. Despite its dangers, Latin American social medicine has emerged as a productive field of work, whose findings have become pertinent throughout the world.
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