Tear gas exposure and its association with respiratory emergencies in infants and older adults during the social uprising of 2019 in Chile: an observational, longitudinal, repeated measures study.

Objective: To evaluate if extensive use of tear gas during the Chilean social uprising of 2019 was associated with a higher frequency of respiratory emergencies and bronchial diseases in a residential vulnerable population.

Design: Observational, longitudinal, repeated measures study.

Settings: Six healthcare centres (one emergency department and five urgent care centres) in the city of Concepción, Chile during 2018 and 2019.