Don't care about antibodies. Let's care for innate immunity; T cell and macrophage.
I think vaccination development to create antibodies against SARS-CoV-2 is unyielding since some of the recovered patients didn't have antibodies according to the early Chinese study . If we include asymptomatic patients, the number of recovered patients without antibodies would be the majority. The reliable antibody test in Japan shows only 0.6% for Tokyo and 0.4% for the Touhoku district. 0.6% for Tokyo is 10 times of the PCR tested patients and 0.4% of the Touhoku district is 100 times of the PCR tested patients. What do these facts mean? There are many more infected people than we can trace by PCR testing, which applies to all countries. The rate of antibody generation varies by region ten times or Touhoku PCR test tracking is one-tenth of the Tokyo region. Well, the only single point is that we cannot get the whole picture of this disease by antibody testing. No evidence but from my own experience and hearing, I guess that around 20% of people in Tokyo have infected....