It is a live vaccine which means it contains a weakened version of the chickenpox virus. As such, it is not recommended for those with a compromised immune system because of an illness like HIV or as a result of treatment such as chemotherapy.
“今天可能要让你们失望了，这次讨论的不是发展问题，而是保护的问题。”2016年1月，推动长江经济带发展座谈会在重庆召开，习近平总书记开门见山。
。同城约会对此有专业解读
"I believe we've had a problem here," said Swigert. Lovell had to repeat the message to a stunned Mission Control: "Houston, we've had a problem."
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