Common cold Cause of Disease and Pathomechanism 六淫(six exogenous pathogenic,factors) 冬时行病毒(seasonal virus 冬人体正气(health qi)不足 其病机关键在于邪实正虚(excess of evil and asthenia of health qi 66 v六淫( six exogenous pathogenic factors ) v时行病毒( seasonal virus ) v人体正气( health qi )不足 其病机关键在于邪实正虚(excess of evil and asthenia of health qi ) 。 Common cold