Positivity of antibodies to severe acute respiratory syndrome coronavirus 2 in 58 asymptomatic or mildly symptomatic patients at 8 mo after infection, South Korea*
we confirmed that rates of antibody positivity according to 3 commercial kits was still high at 8 months after infection, even in asymptomatic or mildly symptomatic participants (69.0%–91.4%).
In this study, the initial neutralizing antibody reaction appeared to correlate with the severity of the disease. However, patients with pneumonia were considerably older than asymptomatic persons, and increasing age is associated with a stronger neutralizing antibody response (10). In this study, neutralizing antibody titer decreased more in symptomatic than asymptomatic patients.
是不是无效？
那些无症状感染者（例如一些学生）的抗体水平与有症状者比较有何差别？
来自CDC网站，注意下表最后两行。
https://wwwnc.cdc.gov/eid/article/27/3/20-4543_article
Table 2Positivity of antibodies to severe acute respiratory syndrome coronavirus 2 in 58 asymptomatic or mildly symptomatic patients at 8 mo after infection, South Korea*
*Anti-N, antinucleocapsid; anti-S, antispike; anti-S1, antispike subunit; ECLIA, electrochemiluminescence immunoassay; pan-Ig, panimmunoglobulin; sVNT, surrogate virus neutralization test.?†Roche Diagnostics (https://diagnostics.roche.com). ?‡Epitope Diagnostics (https://www.epitopediagnostics.com).?§InBios International (https://www.inbios.com).?¶Euroimmun (https://www.euroimmune.com).?#GenScript (https://www.genscript.com).?**p<0.01.?††p<0.05.
Conclusionswe confirmed that rates of antibody positivity according to 3 commercial kits was still high at 8 months after infection, even in asymptomatic or mildly symptomatic participants (69.0%–91.4%).
没有经历副作用的不会满世界嚷嚷。
也是CDC网站上的。注意图中的红线（代表无症状感染者）的水平几乎不随时间流逝而减低。
https://wwwnc.cdc.gov/eid/article/27/1/20-3515_article
In this study, the initial neutralizing antibody reaction appeared to correlate with the severity of the disease. However, patients with pneumonia were considerably older than asymptomatic persons, and increasing age is associated with a stronger neutralizing antibody response (10). In this study, neutralizing antibody titer decreased more in symptomatic than asymptomatic patients.
除此之外，没有任何其它反应。
https://www.nature.com/articles/s41591-020-0965-6
https://medicalxpress.com/news/2021-03-covid-antibodies-blood-donations.html
https://www.fox29.com/news/covid-19-antibodies-found-in-1-in-5-blood-donations-from-unvaccinated-people-in-march-red-cross-data-shows
我家四个第一针都没啥，第二针全趴下了。
记得那位网红医生痊愈不久去注射疫苗结果跟大病一场似的。
我觉得没有反应的人大概就是那些如果真的感染会成为无症状感染者的人。