CA virus. It refers me to Microsofts Security Scanner to remove the virus. When I download and run the scan (both quick and full scans). Pediatrics. Oct; Para-influenza 2 (CA) virus: etiologic association with croup. KIM HW, VARGOSKO AJ, CHANOCK RM, PARROTT RH. The website for West Nile Virus education, statistics, and dead bird reporting for California. Looking for online definition of CA virus in the Medical Dictionary? CA virus explanation free. What is CA virus? Meaning of CA virus medical term. What does . West Nile virus (WNV) is a mosquito-borne disease first detected in the United States in WNV first appeared in California in and by. Computer virus hits newspapers coast-to-coast The Ventura County Star newspaper in Southern California also was affected, the paper said.