Thinking Step 4: 推理第三个人。他听到了前两个人的话，推断出前两个人都想要。加上他自己也想要，所以三个条件都满足。
It had previously been thought that vaccinating children against chickenpox would cause a problematic rise in the linked condition shingles, but a recent long-term study from the US disproved that theory.
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The market reacted positively to the news, with Block's shares rising by nearly 30 percent in extended trading following the announcement.