Thanks again for your thoughtful comment. I think i agree that perhaps mass antibody testing may underestimate the total number of infections, as compared to T-cell testing.

However, I still think that Covid-19 poses a substantial burden on pubic health. I've added this paragraph to address the point:

"The fact that Covid-19 kills more than flu is quickly evident by “the number of deaths that exceed what is seen in typical years,” the academic journal Nature reported in September. In other words, deaths from Covid-19 are not deaths that ‘would happen anyway’."

But I'm open to any discussions. :))