No,but the antibody tests are lowering the death rate by increasing the number of people who have it without dying which was the point....not that it's widespread (whatever that definition is bc it changes with motivation).
And it has a 50% error rate with most of those being false positives. Obviously, you can’t just take reported cases and deaths. There will be more deaths added to the final estimate and more cases added based on antibody tests over the next 6 or so months.