• But knowing how much natural immunity has been acquired through infection is more difficult, especially given the very mild nature of illness in the vast majority of patients.

    很难说清因感染获得何种程度的天然免疫力尤其是因为绝大多数患者身上,疾病性质非常温和

    youdao

  • But knowing how much natural immunity has been acquired through infection is more difficult, especially given the very mild nature of illness in the vast majority of patients.

    很难说清因感染获得何种程度的天然免疫力尤其是因为绝大多数患者身上,疾病性质非常温和

    youdao

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