Presence of CSF IgM do not have protective effect in Nipah encephalitis Presence of CSF IgM do not have protective effect in Nipah encephalitis Presence of CSF IgM do not have protective effect in Nipah encephalitis Presence of CSF IgM do not have protective effect in Nipah encephalitis Presence of CSF IgM do not have protective effect in Nipah encephalitis