IgM methods can be used, because the chance of such a false positive results are found relatively little, because this group is the first of the flavivirus infections (primary flavivirus infection.)
IgM can be used as an opportunity to meet the relatively few false positives. Since this is the first infection of a flavivirus (primary flavivirus infection).
Can use method IgM. Since the chance to find such false positives is relatively low. Due to this group"s infection, first of flavivirus (primary flavivirus infection).