RT Journal Article SR Electronic T1 Transmission of Antibodies Against Influenza Virus A Across the Placenta JF The Journal of the College of General Practitioners JO J Coll Gen Pract FD British Journal of General Practice SP 434 OP 440 VO 3 IS 4 A1 J. O. Newman YR 1960 UL http://bjgp.org/content/3/4/434.abstract AB