May be double? Equally plausible that it could be half.
There is NO empirical reason to accept either of these ‘guesses’.
Red Cross data suggests 20% of unvaccinated blood donations show presence of antibodies. Blood donors may not be the ideal sample population but it is empirical evidence that the covid infection count is double the official numbers.
That also means the hospitalization and death rate is 1/2 (as a percentage).