What is the fine-grained topic of the following text: The Department of Health and Wellness, which recently announced that it had launched a probe into the deaths of several men there, said it had received confirmation from the Trinidad based Caribbean Public Health Agency (CARPHA), of the "association of H1N1 influenza, in one of the recent, respiratory deaths among males." Only return the topic.
Investigation into respiratory deaths among males associated with H1N1 influenza in Trinidad