“That is unproven, but there is evidence now for cross-reactivity at T-cell level at least, and that well might help dampen the effects of the virus when we get it.”

“这还没有经过证实，但是现在有证据表明病毒至少在T淋巴细胞层面会发生交叉反应，这会在感染时降低病毒的危害性。”

Studies have shown that by the age of four, some 70 percent of children already have antibodies against seasonal coronavirus, which could offer important protection.

过去的研究显示，大约70%的儿童在四岁前已经对季节性冠状病毒拥有抗体，该抗体能提供重要的保护作用。

Professor Adrian Hayday, Chair, Department of Immunobiology, King's College London said the immune systems of young people may simply be better at reacting to new viruses.

伦敦国王学院免疫生物学部主任阿德里安·黑戴教授表示， 年轻人的免疫系统可能就是更善于应对新病毒。

“All adults past a certain age - 30 to 35 - eventually have no thymus so their T-cells work by looking at whether they have seen something before, whereas children are very good at seeing things that are completely unknown.

“所有超过一定年龄——30到35岁——的成年人最后胸腺组织都会消失，所以他们的T淋巴细胞是否发挥作用取决于他们是否感染过这种病毒，而孩子们的T淋巴细胞则非常善于应对完全陌生的病毒。”

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