無抗體唔代表對某個抗原無免疫力。有抗體只代表你嘅免疫系統係打緊仗或者啱啱打完仗。打完仗，你嘅抗體會漸漸消失，但係你嘅免疫系統會記住嗰個抗原。
https://elemental.medium.com/theres-good-news-about-your-immune-system-and-the-coronavirus-7d2c1fc976c1.https://elemental.medium.com/theres-good-news-about-your-immune-system-and-the-coronavirus-7d2c1fc976c1