Figure 2.
Local and systemic measures confirming infection with influenza virus. (A) Viral shedding confirmed by nasal swabs from flu-exposed mothers. (B) Systemic reaction evident by increased neopterin levels at 3–7 days after exposure to influenza. (C) Significant correlation between the levels of flu-specific antibody (immunoglobulin G [IgG] class) found in virus-exposed mothers and their neonates at 2–3 days after birth.