You can prevent PCP.

Bibliographic Details
Corporate Author:	National Center for HIV, STD, and TB Prevention (U.S.). Division of HIV/AIDS Prevention
Format:	Government Document Book
Language:	English
Published:	[Atlanta, Ga.]. : Centers for Disease Control and Prevention, National Center for HIV, STD, and TB Prevention, Divisions of HIV/AIDS Prevention, [1999]
Subjects:	Pneumocystis carinii pneumonia > Prevention. HIV-positive persons > Health and hygiene.
Online Access:	https://purl.fdlp.gov/GPO/LPS85578

Description
Item Description:	Title from title screen (viewed on Aug. 30, 2007). "Updated in: March 1999." Electronic resource.
Physical Description:	1 electronic text : HTML file.
Format:	Mode of access: Internet from the CDC Web site. Address as of 8/30/07: http://www.cdc.gov/hiv/pubs/brochure/pcpb.htm; current access is available via PURL.