IL5 and COVID-19: When combined with IL-5 levels and Eos counts, the predictive value was even higher, indicating the advantage of using a 25(OH)D level < 36.04 ng/mL combined with an IL-5 level > 1.70 pg/mL and an Eos count > 0.015 in place of 25(OH)D alone to predict COVID-19-related death.