The primary objective of this study is to describe the safety and tolerability of multiple doses of MEDI-534 at 10^4, 10^5, or 10^6 TCID50 when administered to RSV and PIV3 seronegative children 6 to <24 months of age.
The overall objective of the MEDI-534 clinical development program is to evaluate the safety, efficacy and tolerability of MEDI-534 for the prevention of serious RSV and PIV3 disease in young infants.