CRP and COVID-19: The pooled prevalence of leukopenia in pediatric COVID-19 patients was estimated to be 7.3% (95% CI: 3.4–12.2%), while the corresponding values for high C-reactive protein level, high LDH level, high creatine kinase MB level, high AST level, and high erythrocyte sedimentation rate were 14.0% (95% CI: 6.8%–22.8%), 17.4% (95% CI: 7.8%–29.3%), 43% (95% CI: 25.4%–61.5%), 12.3% (95% CI: 7.5%–17.8%), and 29.7% (95% CI: 10.0%–53.3%), respectively.