in·fec·tive /ɪnˈfɛktɪv/ 形容詞
In·fect·ive a. Infectious.
True love . . . hath an infective power. --Sir P. Sidney.
adj 1: able to cause disease; "infective agents"; "pathogenic
bacteria" [syn: morbific, pathogenic]
2: caused by infection or capable of causing infection;
"viruses and other infective agents"; "a carrier remains
infective without himself showing signs of the disease"