Recovery from infection by one provides lifelong immunity against that virus but confers only partial and transient protection against subsequent infection by the other three viruses.
感染一种病毒并恢复后，对该病毒具有终生免疫，但对此后感染的其他三种病毒只有部分和短暂免疫力。
2
Transient hair loss and gait disturbance may occur during recovery.
在恢复期间可出现短暂脱发和步履不稳。
3
RECOVERY has long seemed a transient guest in America.