Thomson Reuters Foundation– April 14, 2020. Respiratory problems can also be made worse by “co-morbidities” – or existing medical conditions – like hypertension and diabetes, said Ramanan Laxminarayan, director of the Washington D.C.-based Center for Disease Dynamics, Economics and Policy. “The poor are more likely to have these co-morbidities and are exposed to higher levels of air pollution because they are more likely to be involved in physical labour that requires exertion that is hazardous when air quality is low,” he said.