CD40LG and susceptibility to pneumonia measurement: However, seroconversion of NP-specific antibodies occurredlater than seroconversion of antibodies against several S proteins and inactivated MERS-CoV.Woo et al.12 evaluated the longitudinalprofile of IgG and IgM antibodies against SARS-CoV NP in patients with pneumonia due toSARS-CoV.