Human parainfluenza virus type 3 expressing the respiratory syncytial virus pre-fusion F protein modified for virion packaging yields protective intranasal vaccine candidates. - Xueqiao Liu; Bo Liang; Xiang Liu; Emerito Amaro-Carambot; Sonja Surman; Peter D Kwong; Barney S Graham; Peter L Collins; Shirin Munir (PLoS ONE, 2020)