Covid, the race to test for antibodies. But are they really useful?

THE FIRST says: “I am at an altitude of 318, but how many do you have?”. And the other replied: “Many more, 2,420. I am well protected”. They confront each other on antibodies the two friends. And they refer to personal ‘endowment’, almost bragging about it as an acquired merit. But in the era Covid and vaccines, such dialogues are on the agenda.