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。

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.

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个人无偿赠与不动产、土地使用权，属于下列情形之一的，暂免征收营业税。

II. Where an individual grants any immovable or land use right as gift under any of the following circumstances, it shall be temporarily exempt from the business tax.

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对个人销售或购买住房暂免征收印花税； 对个人销售住房暂免征收土地增值税。

The new policy also removed the stamp duty and land value-added tax for individual residential transactions, starting from next month.

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