CP and infection: For MP, infection with Flu B (OR = 1.995, p < 0.05), Flu A (OR = 2.154, p < 0.05), Adv (OR = 2.967, p < 0.05), CP (OR = 31.111, p < 0.05), or PIV3 (OR = 5.017, p < 0.05) was an independent factor associated with the incidence of MP in the simple logistic regression analysis.