| hepatitis a outbreak in a neonatal intensive care unit: risk factors for transmission and evidence of prolonged viral excretion among preterm infants. | an outbreak of hepatitis a virus (hav) infection in a neonatal intensive care unit (nicu) provided the opportunity to examine the duration of hav excretion in infants and the mechanisms by which hav epidemics are propagated in nicus. the outbreak affected 13 nicu infants (20%), 22 nicu nurses (24%), 8 other staff caring for nicu infants, and 4 household contacts; 2 seropositive infants (primary cases) received blood transfusions from a donor with hav infection. risk factors for infection among n ... | 1991 | 1651359 |