感謝您提供的鏈接，我昨天去Labcorp查了SARS-CoV-2 Semi-Quant Total Ab，目的是想知道打了兩針疫苗後的抗體保護量。
我四月底完成第二針Pfizer，到如今已經六個月了。我想知道是否應該現在就打Pfizer 第三針，所以查一查抗體情況。今早結果出來了，如下，請您幫忙決定是否該打還是再等等。非常感謝。
Test Name: SARS-CoV-2 Semi-Quant Total Ab
Current Result and Flag: 866.0 u/ml
Reference： Negative < 0.8
SARS-CoV-2 Spike Ab Interp: Positive
Antibodies against the SARS-CoV-2 spike protein receptor binding domain (RBD) were detected. It is yet undetermined what level of antibody to SARS-CoV-2 spike protein correlates to immunity against developing symptomatic SARS-CoV-2 disease. Studies are underway to measure the quantitative levels of specific SARS-CoV-2 antibodies following vaccination. Such studies will provide valuable insights into the correlation between protection from vaccination and antibody levels.
