4 RCs.

This document provides general information about the types of pollutants affected by air cleaners, and discusses the types of air-cleaning devices and technologies available, metrics that can be used to compare air-cleaning devices, the effectiveness of air-cleaning devices in removing indoor air pollutants, and information from intervention studies on the effects that air cleaners can have on health and on health markers.

3 RCs.

This report updates the 2006 CDC recommendations for the diagnosis and management of tickborne rickettsial diseases in the United States. Updated recommendations are needed to address the changing epidemiology of tickborne rickettsial diseases, provide current information about new and emerging tickborne rickettsial pathogens, and highlight advances in recommended diagnostic tests and updated treatment information.